Surprising Vijay Amritraj of India easily handled Australian John Alexander, 6-3, 6-4, in the third round of the $200,000 WCT invitational tonight.

The victory was Amritaj's second in three matches of the six-player round-robin event and clearly establishes him as a possible contender for the final. Amritraj, a tourney alternate, was thrust into action Tuesday night after Jose Higueras of Spain withdrew because of an injury.

Alexander was no match for the tall, lean Amritraj, who had total command of the court, Amritraj ran the score to 5-1 in the first set with two early service breaks.

A service break midway into the second set was all Amritraj needed to wind up the match.

Bjorn Borg kept his winning ways intact by handing Eddie Dibbs a 6-3, 6-3 setback. It was the 15th straight victory for Borg over Dibbs.

Borg, unbeaten in his first three matches in the invitational, is the only unbeaten participant.

Jimmy Connors, struggling off any side effects he may have from a Wednesday night fracas, whipped the Nastase, 6-4, 6-4.

Connors said following the match that his left wrist, injured slightly in the altercation with a fan who attempted to kiss Connors' wife, was "feeling fine."