LONDON -- With both Serena and Venus Williams through to the last four at the All England Club, the sisters could end up playing each other in a Grand Slam final for the first time since the 2009 edition of The Championships.Tennis fans shouldnt be getting ahead of themselves. With Serena to play Russias Elena Vesnina and Venus to meet Germanys Angelique Kerber in Thursdays semifinals, here are five reasons why that hoped-for all-Williams title match might not materialise:Serenas self-doubtFor Serena, every match is a fight against herself -- she has to overcome that emotion as well as her opponent, her coach, Patrick Mouratoglou, observed recently.Winning Wimbledon again would put Serena level with Steffi Grafs modern-era record of 22 Grand Slam titles, and the closer she gets to history, the more likely she is to experience nerves or self-doubt on the grass.I cant expect Serena not to be human. Serenas emotions show that she cares. She feels something, and she has to fight through those emotions and find solutions on the court, Mouratoglou said.Serena, whose 21st major came at Wimbledon last year, has faltered at her past three Grand Slams -- in the semifinals of last seasons US Open, and in this years Australian Open and Roland Garros finals. Have those defeats left little rips and tears in Serenas on-court psyche?Kerbers confidenceThis is the first time that Kerber has played this tournament as a Grand Slam champion, after her triumph at Januarys Australian Open, and she has never been as self-assured on grass as she is now.That Melbourne victory made her the first German woman to score a major singles title since Graf at Roland Garros in 1999, and she is the only one of the semifinalists yet to drop a set this tournament. No wonder Kerber has been saying, I have a lot of confidence.She already has defeated one Williams sister at a Grand Slam this season too -- with that Australian success coming against Serena -- so why cant she also beat the other one here in the last four? I know how to play on grass, said Kerber, who is in her second Wimbledon semifinal.Major memories fadeCan Venus still remember how to win a Grand Slam semifinal? Its a long time since she played at this stage of a major, with that last appearance in the final four coming at the 2010 US Open.And its seven years since Venus won a Grand Slam semifinal -- that was at the 2009 Wimbledon Championships, when she finished as the runner-up to her sister.However, unlike her younger sister, she wont be walking out on to the grass with a racket bag loaded up with pressure and expectation.At the age of 36, and the oldest Grand Slam semifinalist since Martina Navratilova here in 1994, Venus can play a lot more freely than Serena, carrying mostly romantic hopes on her shoulders rather than anything heavier.Fearless VesninaOf the four semifinalists, its the unseeded Russian who has the least to lose on Thursday. She also has resolved to make the most of her contest with Serena (having fun is about the last thing that will be on the younger Williams sisters mind on Centre Court).Thats a dream semifinal, Vesnina said after getting through to the last four. Nothing can be better than playing against Serena in a semifinal on Centre Court at Wimbledon. Its special.Of course, I need to try to win this match. Its not only about you have to show your best tennis. You have to stick to your game, you have to be solid, you have to enjoy yourself on the court. Of course, I will try to win it.And the more freely Vesnina plays, the more Serena might start doubting herself.Record defenceKerber will be looking to protect Grafs record of 22 Grand Slam titles again. Her victory over Serena at the Australian Open prevented the Californian from going level with the German who dominated the womens game. Yeah, I think I helped Steffi right now, Kerber said after that Melbourne victory.Clearly, Kerbers main motivation will be to win a first Wimbledon title, with any thoughts for Graf secondary.But patriotism could still be a factor if her views on the German soccer team, who play their own semifinal against France in the European Championships on Thursday, are anything to go by.I am looking forward to both [semifinals] actually, Kerber said after beating Dominika Cibulkova in her quarterfinal. I will start, then I hope that the German football team will make the final as well.She would be doing her bit for German tennis if she could beat Venus as that probably would give her a final against Serena and the opportunity to once again stop history being made. Custom Canucks Jerseys . The injury bothered Bledsoe in the Suns victory over the Clippers on Monday and he sat out the teams home loss to Memphis on Thursday night. Canucks Jerseys China . -- Claudio Bieler hadnt scored since early September, and not from the run of play since mid-July. http://www.customcanucksjersey.com/ . Rinne played two periods in his first game since left hip surgery in early May. Gabriel Bourque scored 3:07 into the second period and Austin Watson tallied 5:15 later for Nashville. Authentic Custom Canucks Jersey .J. -- Pitcher Carl Pavano is retiring after 14 major league seasons. Custom Canucks T-shirts . -- The St. Johns IceCaps weathered a wild first period with the help of goaltender Jussi Olkinuora, before finding offensive inroads in the second. Thanks to a dramatic season-opening 50-47 win over Notre Dame and a 41-7 thumping of UTEP, the heat is off Texas head coach Charlie Strong.But for the 11th-ranked Longhorns to become serious Big 12 contenders, theyll need to find a way to improve greatly on a 1-4 road record in 2015. The first chance to do that comes on Saturday night when Texas (2-0) travels to the Bay Area to face Cal (1-1).California, behind future No. 1 NFL Draft pick Jared Goff, handed Texas a 45-44 home loss last season, a contest that ended with kicker Nick Rose missing an extra point that would have possibly sent the game to overtime. A victory in the rematch Saturday would give Texas its first 3-0 start since 2012, even Strongs record in Austin to 14-14 and possibly move the Longhorns into the top-10 next week.Youre taking a young team into a hostile environment, Strong said. There are certain things as a team that you have to pack. Youve got to pack your defense. We can take the crowd out of the game if we can play great defense.When it comes to traveling with confidence, Strong said he will lead by example.Its all about the attitude of the players and even the coaches, Strong said. They will look at how we lead and thats how theyll go.Texas will face a couple of Texans across the field in Cal coach Sonny Dykes, son of former Texas Tech coach Spike Dykes, and quarterback Davis Webb, who transferred to the Golden Bears from Texas Tech. No matter the results for either team coming into the game, Dykes and Webb have familiarity with Texas and no doubt burn to beat the Longhorns.They also have the offense to properly duel with Texas.Strong knows his team will have to accept giving up yards, but also need to make a few big plays on defense.Its going to be a big challenge for our secondary, Strong said. We need to get pressure on the quarterback to take pressure off the secondary because some balls are going to be completed.dddddddddddd. We just cant allow balls to be thrown over our head.Cal graduated a ton of its leaders, across the table defensively, including Goff: the Los Angeles Rams first pick in the NFL draft. His replacement, senior transfer Davis Webb, has been splendid -- including in the Golden Bears 45-40 loss to San Diego State Saturday on the road.Webb threw for 522 yards and five touchdowns, so the Golden Bears offense wasnt the problem. As its been in recent years, it was the defense yielding 281 rushing yards and three touchdowns to Aztecs tailback Donnel Pumphrey, the reigning Mountain West Conference Offensive Player of the Year.Now, Cal sits in danger of falling to 1-2 with the opening of Pacific-12 Conference play waiting on Sept. 24 at Arizona State. Golden Bears coach Sonny Dykes, in his fourth year in Berkeley, was proud of the effort, though, according to the San Francisco Chronicle.Our effort was outstanding. He said that was the hardest any team has ever played under him, Cal wide receiver Chad Hansen said, reflecting on Dykes postgame message. Its no consolation, but we know we left everything out on the line.Hansen is becoming the breakout star the Golden Bears believed he could be. After Cals six most productive wide receivers saw their collegiate eligibility end after 2015, Hansen has posted team-highs with 28 catches for 350 yards. Those numbers also lead the FBS. He also has caught three TDs. The 6-foot-2, 205-pound junior had 14 grabs for 190 yards and a TD against San Diego State.The Longhorns have benefitted from two capable quarterbacks in true freshman Shane Buechele (starter) and senior Tyrone Swoopes (dynamic running threat). Swoopes made a name for himself in the Notre Dame win with three rushing TDs. ' ' '