David Frost blossomed on a day when play was interrupted for almost an hour by lightning at yesterday's St Jude classic in Memphis, Tennessee. The South African shot a second 63 in two days to take a four-shot lead in the tournament.

Plagued by poor form recently Frost had only arrived at the venue on Wednesday night, but expressed himself thrilled with the transformation. "I obviously didn't expect to shoot two 63s," he said. "Last year, I shot two 71s and missed the cut. I'm very happy with the way I've played the last two days. Hopefully, it will just snowball over the next two days."

Hal Sutton, who was tied for the lead with Frost and Tom Lehman after one round, shot a 67 and was alone in second at 12-under.

Lehman shot a 68 despite suffering from flu-like symptoms that sent him straight to bed after his round. With Lehman at 11-under were PH Horgan III and Jerry Kelly.

Among the group at 10-under were Ted Tryba and Emlyn Aubrey, both of whom shot recordtying 29s on the front nine. Defending champion Nick Price shot even par and was at seven-under.