Querrey overpowers Davydenko at Pilot Pen

American Sam Querrey has upset top-seeded Nikolay Davydenko 6-3, 3-6, 6-4 to advance to the semifinals of the Pilot Pen tennis tournament. The hard-serving Querrey fired 15 aces, but was down in the pivotal ninth game of the third set Thursday. Four serves and two aces later, he took a 5-4 lead and then broke Davydenko at love to close out the match. Davydenko needed a doctor to look at his right wrist midway through the match.