[PAR] [TLE] Roger Federer [SEP] Roger Federer (] ; born 8 August 1981) is a Swiss professional tennis player who is currently ranked world No. 2 in men's singles tennis by the Association of Tennis Professionals (ATP).  Federer has won 19 Grand Slam singles titles, the most in history for a male tennis player and has held the world No. 1 spot in the ATP rankings for a record total of 302 weeks, including a record 237 consecutive weeks.  After turning professional in 1998, he was continuously ranked in the top ten from October 2002 to November 2016. [PAR] [TLE] 2006 Dubai Tennis Championships – Men's Singles [SEP] Roger Federer was the defending champion but lost to Rafael Nadal in the final, 2–6, 6–4, 6–4.
[PAR] [TLE] Roger Federer [ SEP ] Roger Federer ( ] ; born 8 August 1981 ) is a Swiss professional tennis player who is currently ranked world No . 2 in men 's singles tennis by the Association of Tennis Professionals ( ATP ) . Federer has won 19 Grand Slam singles titles , the most in history for a male tennis player and has held the world No . 1 spot in the ATP rankings for a record total of 302 weeks , including a record 237 consecutive weeks . After turning professional in 1998 , he was continuously ranked in the top ten from October 2002 to November 2016 . [PAR] [TLE] 2006 Dubai Tennis Championships – Men 's Singles [ SEP ] Roger Federer was the defending champion but lost to Rafael Nadal in the final , 2–6 , 6–4 , 6–4 .
At 2006 Dubai Tennis Championships – Men's Singles, Rafael Nadal defeated the defending champion who has won how many Grand Slam singles titles?
At 2006 Dubai Tennis Championships – Men 's Singles , Rafael Nadal defeated the defending champion who has won how many Grand Slam singles titles ?
19
19