Donovan, 28, is separated from his wife, actress Bianca Kajlich, but they are not divorced – a fact the U.S. soccer star emphasized last week, after he and Kajlich shared an emotional phone call following his winning goal against Algeria.
Regarding the pregnancy report, Donovan did not deny it might be true, telling Sports Illustrated's Web site: "I was informed of the possibility during the World Cup, and if I need to take responsibility, then I will provide the appropriate support. This is a private matter, and I will refrain from further comment at this time."
Donovan has spent most of his pro career in the U.S., but played on loan for Liverpool club Everton for several months this past winter. He quickly became a fan favorite, and chants of "USA! USA!" were often heard in the stands.
He was also a hero for the USA at this month's World Cup, scoring three goals and guiding the team to the knockout phase, where they were eliminated on Saturday by Ghana.
Donovan's contact with Kajlich, 33, during the World Cup – he also blew her a kiss during a post-game interview – fueled speculation that they might reconcile. "It would surprise no one if Landon and Bianca were back together very soon," said one of Kajlich's friends. "They have remained in contact and are very close to one another."