Cameron Norrie needs to "take risks" when he faces the "ultimate challenge" of playing Novak Djokovic in the Wimbledon semi-finals, says Tim Henman.
The 26-year-old had never been beyond the third round of a Grand Slam until this year's tournament.
"It's a two-horse race. Djokovic is the heavy favourite but Cam's always got a chance," Henman told BBC Sport.
"We've seen these upsets in the past and, fingers crossed, Cam can provide one of the biggest upsets."
The winner will face Nick Kyrgios in the final on Sunday after Rafael Nadal withdrew from the tournament because of his abdominal injury.