Postpublished at 18:06 British Summer Time 3 July 2015
BBC Sport's Adam Williams at the Ageas Bowl: "A crunch match at the Ageas Bowl this evening as two teams level on points in the South Group meet.
"Perennial Finals Day attendees Hampshire, currently fourth, have 10 points from nine games, while Glamorgan have the same number of points, though they have played a game more.
"It's getting a bit tetchy for Hampshire of late. They've lost their last two games in the competition - including the last home match against in-form Sussex - and their County Championship form doesn't make great reading either.
"Glamorgan squeaked home against Somerset in their last T20 Blast match on Sunday - by just three runs."