Top-seeded Andre Agassi routed Steve Guy of New Zealand, 6-4, 6-0, Wednesday night in his opening match of the U.S. Pro Tennis championships at Brookline, Mass.
Agassi struggled a bit in the first set but took charge in the second, breaking his 220th-ranked foe in the first, second and fifth games to end the match in exactly one hour.
Second-seeded Mats Wilander required only 77 minutes to dispose of Michael Robertson of South Africa, 6-3, 6-2.
Wilander took a 4-1 lead in the first set but needed to hold service in the eighth game and a service break in the ninth to beat Robertson, ranked 218 in the world.
Earlier, the tournament's third-seeded player, Alberto Mancini of Argentina, lost to Phil Johnson, 7-6 (7-5), 6-2. Johnson lost in qualifying but got into the tournament because of several withdrawals.
In another match, fourth-seeded Jay Berger ousted Martin Wostenholme of Canada, 6-3, 3-6, 6-3.
Top-seeded Paul Annacone rallied for a 4-6, 6-3, 6-2 victory over Brad Drewett of Australia and advanced to the quarterfinals of the Volvo Tennis-Hall of Fame Championship at Newport, R.I.
Annacone trailed, 0-40, in the opening game of the final set before coming on to break Drewett's serve and take control of the match.
Annacone will play Glenn Layendecker, a 4-6, 6-3, 6-1 winner over eighth-seeded Kelly Evernden of New Zealand, in one of Thursday's quarter-finals.
In other matches, Christian Saceanu of West Germany upset fourth-seeded Derrick Rostagno, 6-4, 1-6, 7-6 (7-5), and Danie Viser of South Africa knocked off seventh-seeded Pieter Aldrich, also of South Africa, 6-4, 4-6, 6-3. Second-seeded Johan Kriek defeated Gary Muller of South Africa, 6-1, 6-4, and sixth-seeded Peter Lundgren of Sweden beat Jeff Tarango, 6-4, 7-5.