Tennis legend Serena Williams has said she «always looked up to” Roger Federer after the Swiss superstar announced his retirement on Thursday. Federer, 41, said on social media that after this year's Laver Cup — which runs from September 23 to 25 and is exclusively live on discovery+ and eurosport.co.uk — he will step away from tennis for good after a series of injuries and operations. Ad The announcement has been met with an outpouring of love across tennis and the wider sporting spectrum, and Serena Williams has been the latest great to venerate the 20-time Grand Slam winner.