Second-seeded Thomas Johansson of Sweden defeated Germany's Philipp Kohlschreiber 6-3, 6-4 Tuesday to advance to the second round of the St. Petersburg Open.
In a rematch of the last season's final, defending champion Mikhail Youzhny of Russia made it into the second round when Karol Beck of Slovakia retired with a right-knee injury.
Fourth-seeded Youzhny, who beat Beck in straight sets last season to claim his second career title, won four consecutive games to win the first set 6-4. He was leading 4-1 in the second when Beck retired.
Johansson, the 1997 champion, served eight aces and had a break in each set to win his match against Kohlschreiber in 66 minutes.
Earlier, fifth-seeded Nicolas Kiefer of Germany rallied in the third set to beat Spain's Guillermo Garcia-Lopez 6-3, 3-6, 6-4.
Kiefer, ranked 29th, had two breaks in the opening set and was leading 3-2 in the second before Garcia-Lopez won four consecutive games to even the match.
A break down in the third set, the German evened the match at 3 then capitalized on the Spaniard's double fault in the ninth game to win the match, AP reports.
Chinese military experts are confident that there are only three countries of the world - Russia, the United States and China - that are capable of developing and building fifth generation fighter aircraft