<|im_start|>user
How many grand slams did Boris Becker win?<|im_end|>
<|im_start|>assistant
Boris Becker won a total of six Grand Slam titles during his career. He won Wimbledon in 1985, 1986 and 1989, the US Open in 1989 and the Australian Open in 1991 and 1996.<|im_end|>
