Monica Seles, a former No. 1-ranked tennis player, won 9 Grand Slam singles titles, 53 career titles and a bronze medal at the Sydney Olympics in 2000. She officially retired in 2008, five years after her last match. Seles, 37, was in Manhattan last Monday to help kick off Wimbledon by playing against select fans on a grass court at Rockefeller Center, part of a series of activities presented by HSBC Bank. Q.What have you been doing in retirement?