The first round was completely washed out on Thursday by rain. That was the first time since April 2004, at the Telecom Italia Open, that a round was completely washed out. The second round will be played on Saturday. The cut will be 50 players and ties, instead of 70 and ties, so that the final 36 holes can be played on Sunday.
Alessandro Tadini posted a 6-under-par 66 in the opening round. He was joined in a tie for third place by Bradley Dredge and Wade Ormsby. K.J. Choi, Marcel Siem, Joakim Backstrom and Pierre Fulke are one stroke further back at minus-5.
Campbell, who won the U.S. Open five weeks ago, started his round on the back nine at Gut Kaden Golf and Land Club. He ran off three straight birdies from the 11th to get his round going.
The 36-year-old moved to minus-4 with a birdie on the 15th. Campbell parred five straight holes around the turn. He moved to 5 under when his birdie putt at the par-5 third found the bottom of the cup.
Campbell came right back with a birdie on four. He moved into a share of the lead thanks to a birdie on the par-4 eighth.
'I had the mindset today and the hole seemed as big as a bucket,' Campbell said. 'I'm focusing pretty much on every shot now. In the past, I've tended to fall asleep for two or three holes.'
Stenson, a two-time winner on tour, got off to a flying start as he holed a wedge shot from 110 yards out for eagle on the par-4 10th. He nearly did the same at the next setting up a kick-in birdie. Stenson moved to 4 under with a birdie on the 13th.
The 29-year-old wrapped bogeys at the 16th and 18th around a birdie on 17. Stenson got back to minus-4 with a birdie on the fourth.
The Swede then birdied the par-5 sixth. Stenson closed with back-to-back birdies from the eighth to join Campbell in the lead.
'I could have started two-two because I had an 8-iron pitching behind the hole and it started to come back, but it stopped 2 feet from the hole,' said Stenson. 'I made some good putts and the surface of the greens is good. I didn't take one drop for casual water all day, which is quite amazing after the amount of rain we had.'
Ian Woosnam, who won here in 1986, opened with a 4-under-par 68. He was joined in a tie for 10th by Niclas Fasth, Lee Slattery, Mark Roe, Richard Finch, Alastair Forsyth, Stephen Gallacher, Fredrik Henge, Simon Hurd, Thomas Levet and Steven O'Hara.
Defending champion Trevor Immelman posted a 1-under-par 71 in the opening round and is tied for 49th.