Men's singles main draw action kicked off at the Sony Ericsson Open in Miami on Wednesday, with several former Top 10 players in action in the ATP World Tour Masters 1000 event.

Argentinean wild card David Nalbandian, on the comeback trail after undergoing hip surgery last year, cruised to a 6-3, 6-2 in over Poland's Lukasz Kubot. The former World No. 3 and 2002 Wimbledon runner-up won 82 per cent of points on his first serve, advancing to the second round where he'll play No. 30-seeded Serbian Viktor Troicki.