Graeme Storm of England and Alexander Levy of France each shot a 6-under 66 to share the early lead in the opening round of the Lyoness Open on Thursday.
Both players made three straight birdies on the front nine and seven in total but bogeyed the par-4 last.
Miguel Angel Jimenez of Spain holed four birdies in his first seven holes to join China's Wenchong Liang and Austrian amateur Matthias Schwab one stroke off the pace.
Defending champion Bernd Wiesberger hit a 68. The 61st-ranked Austrian is aiming for a top-10 finish to qualify for the U.S. Open next week.