Moscow: Marat Safin advanced to his first semifinal in 23 events Friday, beating Denis Istomin of Uzbekistan 6-0, 7-6 (4) in the quarterfinals of the St Petersburg Open.
The two-time champion from Russian, currently ranked 77th, last played in the semifinals at the Kremlin Cup a year ago.
Safin won eight straight games to lead 2-0 in the second set, but Istomin broke back in the sixth game to make it 3-3.
Safin broke again for a 5-4 lead with a precise cross-court return, but played sloppy while serving for the match and sent it to a tiebreaker.
Istomin netted a backhand slice on a match point.
Safin, a two-time Grand Slam champion, is playing in his last season on the ATP tour.
The former No 1 has won 15 titles in his career, his last at the 2005 Australian Open.
He has reached two previous quarterfinals this season but gone no further.