Will Roger Federer have a successful 2019 season and will he be able to win a Grand Slam title again? It was only 10 months ago that he triumphed at the Australian Open beating Marin Cilic in a five-set final but at the time Federer was playing better and Novak Djokovic was not at his best.

So, what now for the Swiss? 'It depends how the offseason goes for him,' the former Wimbledon semi-finalist Greg Rusedski said on Sky Sports. 'Depends if they keep the speed of the courts quick as well as they do in Australia.

I think he defines his season on how he does at Wimbledon. That loss to Anderson has really bothered him because that's the one slam he is so desperate to win. He has won it eight times, he'd love to win it nine or 10 times.

I think we'll know where Roger Federer is with slams by the time we get to the end of Wimbledon. He has these little blips here. What he's doing at his age is kind of unprecedented.' Annabel Croft said: 'I think we've all learnt not to write him off because I did that myself about three years ago and he surprised everybody.

Then of course he had knee surgery, took six months off, came back and win the first Grand Slam of the year which was unprecedented. It is the end of the season. Yes, he's probably a little bit mentally fatigued and a bit of tiredness there.' ALSO READ: Rafael Nadal: Worse players than David Ferrer won a Grand Slam title