Venus Williams out of Auckland tournament

After winning her first-round match, an arm injury has ruled Venus Williams out of the remainder of the WTA tournament in Auckland.

Venus Williams has beaten NZ wildcard Jade Lewis in the opening round of the Auckland WTA event. (AAP)

Venus Williams has had to pull out of the ASB Classic with an arm injury after winning her first-round match.

Tournament director Karl Budge says the seven-time Grand Slam winner has a right arm injury and felt pain through her 7-6 (7-2) 6-2 victory over New Zealand wildcard Jade Lewis on Wednesday.

"She wasn't able to serve as she would ordinarily like to and at the level we've come to expect from Venus and unfortunately that has taken her away from the tournament this year," he said.