Kaymer, whose last European Tour title came in the 2014 US Open at Pinehurst, carded five birdies in a flawless round at Golfclub Munchen Eichenried to lie one shot off the lead held by Italy's Andrea Pavan.

With an afternoon thunderstorm forcing play to be suspended for almost three hours, the first round will be completed on Friday.

"I didn't play great but I played solid, put the ball in good positions to give myself chances," Kaymer said.

England's Oliver Wilson is alongside Kaymer on five-under par, with defending champion and Race-to-Dubai leader Matt Wallace part of a large group two shots further back following a 69.

LEADERBOARD

New South Welshman Dimi Papadatos is tied for seventh on three-under.

Wallace, who finished 12th at last week's US Open, played alongside four-time major winner Brooks Koepka in the third round at Pebble Beach and is trying to emulate the World No.1's composure on the course.

"That was probably my proudest moment ever on a golf course playing with him," the 29-year-old added.

"I was three over after nine, not playing well but controlled my emotions well, birdied 14 and eagled the last to shoot level par and keep myself in the tournament.

"I learned a lot that day – leave the door open for something good to happen, and it did."

- Phil Casey, PAA