Roger Federer waving to the crowd. (AP Photo)

After two years away from clay, Roger Federer is returning to dirt in Madrid in May. He has won the tournament three times (2006, 2009 and 2012) in his career, but hasn't played there since 2015 when he lost to Nick Kyrgios in the first round.

Some are questioning whether he will still be competitive on clay after such a hiatus. What do you think?