The Wimbledon championships make a welcome return to the sporting calendar after 2020's cancellation.

Defending champion Novak Djokovic is looking for a sixth title, while Roger Federer will be hoping to win a ninth after his epic final loss two years ago.

Here, the PA news agency picks out five contenders and five hopefuls in the men's draw.

Novak Djokovic

The world number one is currently reigning supreme, holding three of the four grand slams and only exited the US Open last year when he defaulted after mistakenly hitting the ball at a line judge. His recent victory at the French Open took him to 19 grand slam victories and he will have happy memories of his last visit to Wimbledon, having beaten Roger Federer in an epic five-set encounter to take him to five titles. It remains to be seen whether a gruelling two weeks in Paris takes it out of him, but the Serbian is the player to beat.

Roger Federer

The Swiss great will return to SW19 this year with a tinge of regret at how things ended for him two years ago, as he squandered two match points in that marathon final against Djokovic. But the 39-year-old, who has since undergone knee surgery, called time on his French Open campaign at the fourth round stage in order to protect himself and get ready for another tilt at a ninth Wimbledon crown. How his fitness stands up following his injury remains to be seen, but a rested Federer is a dangerous beast and the Centre Court is his hunting ground.

Stefanos Tsitsipas

The 22-year-old has shown himself to be one of the 'Next Gen' players that can take on the likes of Djokovic, Rafael Nadal and Federer as he has started to go deep at the grand slams, culminating in a French Open loss to Djokovic where he was two sets up. He has an exciting all-round game and one, with the flourishing one-handed backhand, that is especially easy on the eye. He has never gone past the fourth round at Wimbledon before, but is in a better shape to challenge for honours this time around.

Alexander Zverev

The Canadian burst onto the scene in 2019 with a number of runs to tour finals, though he could not get his hands on any titles. He has a decent pedigree on grass, having got to the quarter-finals of the junior event and also the final of the doubles. His athleticism and shot-making make him entertaining viewing and this could be his breakthrough slam.

Denis Shapovalov

A player of eye-catching ability, Shapovalov's undoubted potential has yet to be realised on the biggest stage, having only made one quarter-final appearance at a grand slam. The 20-year-old bowed out in the first round of Wimbledon two years ago, but his junior title there in 2016 means grass is a surface he enjoys playing on and any of the big names will be keen to avoid him in the draw.

Reilly Opelka

Anyone who is 6ft 11in and has a monster serve is a challenger on grass, so the 23-year-old American has to be respected. Opelka is improving his all-round game to become more than just an ace-serving machine. He won the 2016 junior title at SW19 so he has pedigree on grass and he will be buoyed by an impressive clay-court swing. Still, he has never gone past the third round at a grand slam so would need to improve.