>> One sore hip, one strained abdomen, one pregnant and absent seven-time champion. As Wimbledon kicks off in London, Reuters Mitch Phillips says, when it comes to a Grand Slam winner, bookmakers don't know what to predict.>> Well, it's real interesting this year. Federer is the favorite, but he's got a tough draw.
And for the first time for a few years, that Big Four doesn't look such a solid unit. We don't really know what kinda shape Djokovic is in. Andy Murray's coming into it on the back of an injury and not in great form. So the rest of the pack for the first time in a long time will be thinking, maybe this is our year.
For a long time it's been so dominated by those Big Four. One or the other might fall, but one or the other always emerges. But this time they're all getting older, they've got some injuries, this could be the start of a changing of the guard that people have talked about for so long.
On the women's side, also very open, more open. Serena Williams, a dominant force in Wimbledon, the women's game is out, as she's pregnant. And again, that's left absolutely wide open.>> With Serena out of the picture, there are question marks over who fills that top spot. As last year's losing finalist, German player Angelique Kerber is one contender.
Then there's Petra Kvitova, she's the favorite to win. But she'd have to make one of the most remarkable comebacks the sport's ever seen to claim her third Wimbledon title. In December, her career was hanging by a thread after she was knifed during a break in at her house in the Czech republic, suffering serious tendon damage to her left hand.
Russia's Maria Sharapova will also be absent. Her return from a drugs ban has been stalled by injury.