I love Wikipedia:

"The world record for most aces in a match is held by John Isner, with 93 aces (although game still ongoing) in a first round match against Nicolas Mahut at the 2010 Wimbledon Championships on June 23, 2010 (Mahut holds second place with 80 in the same match)."

Four minutes later:

"The world record for most aces in a match is held by John Isner, with 93 aces (although game still ongoing) in a first round match against Nicolas Mahut at the 2010 Wimbledon Championships on June 23, 2010 (Mahut holds second place with 82 in the same match)."