China's Li Haotong equalled his career-best round and also the course record with a 10-under-par 62 to take a one-stroke lead in the BMW International Open in Munich.
Niall Power is best of the Irish in action after a level-par round of 72, three shots better off than Cormac Sharvin and Jonathan Caldwell.
The man to catch is the 26-year-old from China, who finished third in the 2017 Open at Birkdale after a final-round 63, had previously shot the number at the 2019 Saudi Invitational.
Starting at Golfclub Munchen Eichenried’s 10th hole he turned in 32 after four birdies but played his final six holes in six under par thanks to two eagles at the par fives.
At the sixth he hit his 207-yard approach to six feet but produced an even better shot at his final hole to leave himself a four-footer for another eagle.
That gave him a two-shot clubhouse lead but that deficit was halved after Dutchman Daan Huizing carded nine birdies later in the day.
"It’s been an incredible day for me. I didn’t expect that as I’ve had a couple of weeks off in Dubai and I didn’t practise much," Li told europeantour.com.
Home favourite Martin Kaymer sits four shots back while his former Ryder Cup team-mate Jamie Donaldson is a shot further adrift after a five-under 67.