(VIDEO) Roger Federer brought onto stage and moved to tears by Andrea Bocelli concert

Roger Federer made a surprise appearance on stage and was moved to tears at Andrea Bocelli's concert.

The 20-times Grand Slam champion took center stage yesterday at a concert by Andrea Bocelli in Zurich after the Italian tenor invited Federer to join him on stage for a couple of minutes. Attendees at the Hallenstadion concert were pleasantly surprised when Bocelli welcomed Federer during the recital in the Swiss capital.

The audience's surprise didn't end there; after the tenor performed the piece 'Nessun Dorma,' Federer broke into tears. The two then left the stage together, bringing an end to the memorable night.

“Roger Federer moved to tears by Andrea Bocelli”

This isn't the first time Federer has made a surprise appearance on stages in his home country. He has previously done so at concerts featuring artists like Elton John and, more recently, during Coldplay's tour in Switzerland. On that occasion, he was invited by Chris Martin, the band's lead vocalist, to join the concert:

"It was I got the invitation from Chris Martin from Coldplay. He said, 'Don't you want to come up on stage tomorrow?' I was in Zurich at the time I just came back from an Elton John concert you know stuff you just do when you don't have much to do anymore."

"I looked at my daughter and I told her, 'Do you think I should be going on stage to do this?' And she was half-asleep, but told me, 'Of course, papa, you only live once,'" the Swiss added.

"Of course, I enjoyed it after. But, you know, I don't need sometimes those anxiety moments anymore. I'm just happy and quite content to be away from it all, but I finished on top, you know, this is my music career. I ended it right there, I dropped the mic," Federer concluded.