Rusedski struck 19 aces, lost only 11 points in nine games on his own delivery and produced a perfect game when leading 2-1 in the second set, serving four successive aces.
Eleven of his 19 aces came in his last three service games and Rusedski said: "My serve just seemed to get better and better and I felt I could hardly miss." But Rusedski also played well when receiving serve, breaking through in the sixth game and earning the first set after only 22 minutes. Then he broke Reneberg again in the first and fifth games of the second set.
A confident Andre Agassi powered into the quarter- finals of the ATP Tour event in Scottsdale, Arizona, with his 13th win this season.
Agassi's 7-5, 6-1 win over Ecuador's Nicolas Lapentti was another bright point of a good year, which follows a terrible 1997 in which the former world No 1, now ranked 50, totalled only a dozen wins.Reuse content