Tim Henman believes tennis will be handed a huge boost if Roger Federer can come back strongly from his enforced absence next year.
Federer has only played one competitive tournament this year - the Australian Open all the way back in January - due to having to undergo two operations on his knee.
The Swiss star, though, has committed himself to playing a full schedule in 2021 despite the fact he will be 40 next year.
He stepped up his practice in Switzerland this week ahead of his usual close-season training camp in Dubai, and Henman believes that although it won't be an easy path back for Federer, he is still capable of making a huge difference to tennis in general.
"We have to hope Roger's rehabilitation goes well, and he can get himself back up to a good level if he enters the Australian Open," Henman said.
"He wants to compete at the highest level, and it will not get any easier for him.
"To compete at the highest level will be challenging, but his eagerness to come back at the age of 39 is incredible.
"Roger has achieved so much and has nothing to prove. Still, he wants to come back and play again, and it will be great for the sport if he can reach the level he expects of himself."
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