Adventure of a lifetime: Roger Federer sings alongside Chris Martin on stage during Coldplay concert - WATCH
India TV NewsOne of the greatest ever tennis players, Roger Federer is enjoying his post-retirement days and recently became one of the special guests at the Zurich concert of the British rock band Coldplay on Saturday, July 1. Federer shared photos and videos as he was on the stage at Stadion Letzigrund along with the lead singer of the band, Chris Martin, guitarist Jonny Buckland, bassist Guy Berryman and drummer Will Champion. Before performing their smash hit 'Don't Panic' from the 2000 studio album Parachutes, Martin called upon Federer on the stage introducing him as "our original band member". Regarded as "the greatest and most successful" sportsperson in Swiss history in his home country, Federer retired last year in September after playing 15,000 matches in his illustrious career of 24 years.