She won 34 singles titles before retiring, including the US Open in 2005 when she defeated French hope Mary Pierce 6-3 6-1 at Flushing Meadows.

CNN: Clijsters ready to rejoin tennis circuit

After dominating the first set, two stunning winners - a backhand down the line and crosscourt forehand winner - saw the two-time semi-finalist, whose only Grand Slam title came at the 2005 US Open, break to love to seal it and she opened the second with a confident hold.

BBC: Wimbledon 2010: Venus Williams wins opening match