Ivo Karlovic

Caused one of tennis's biggest upsets in beating defending champion Lleyton Hewitt in the first round in 2003 in his first match.

Age: 26

Lives: Zagreb, Croatia

Plays: Right-handed

Unseeded

Grand Slam titles: none

Wimbledon record: 2004-fourth round, 2003-third round

Another Ivanisevic clone whose prodigious height of 2.08m allows him to deliver an almost unplayable serve.

Little else about Karlovic's game is remarkable, although his groundstrokes and composure are under-estimated.

Caused one of tennis's biggest upsets in beating defending champion Lleyton Hewitt in the first round in 2003 in his first match at a grand slam tournament.

Issued a timely reminder of the threat he poses on grass by beating Hewitt at Queen's last year, where he reached the final, and is the one player the favourites will want to avoid.