Roger Federer got the boy band back together at Indian Wells

In January, Roger Federer formed a boy band with fellow tennis competitors Grigor Dimitrov and Tommy Haas, belting out Chicago’s 1982 classic “Hard to Say I’m Sorry” with co-writer/megaproducer David Foster at the piano while at the Australian Open.

And while we figured it was just a special one-night engagement, Federer dropped this musical gem on his Twitter account on Friday — showing that not only was the band back together (with Foster, again, tickling the ivories), but they were better than ever, with a catchy, hashtaggable name (the Backhand Boys). And those sweet sweet harmonies:

Clearly, the Backhand Boys have been working hard on their crooning and performance game with the addition of harmony and choreography — and nabbing that mega-cameo from Novak Djokovic.

And this power ballad play may be doing good things for Federer’s tennis game as well. Soon after the debut of the boy band, Federer won the Australian Open — his first Grand Slam title since winning Wimbledon in 2012.

And now, with this new and improved act, Federer made quick work of Rafael Nadal and now is at the semifinals at Indian Wells. Coincidence?