In the 2008 SAP Open-Singles, the defending champion was what British professional tennis player who is a three-time Grand Slam tournament winner?
2008 SAP Open – Singles: Andy Murray was the defending champion, but chose not to participate that year. Andy Murray: Sir Andrew Barron Murray, {'1': ", '2': ", '3': ", '4': "} (born 15 May 1987) is a British professional tennis player from Scotland currently ranked world no. 3 in men's singles. Andy Murray:  Murray represents Great Britain in his sporting activities and is a three-time Grand Slam tournament winner, two-time Olympic champion, Davis Cup champion and the winner of the 2016 ATP World Tour Finals.
Sir Andrew Barron Murray