British rider Mark McNally of Wanty Group finished second on the sixth stage of the Eneco Tour.
The sixth stage was a 197.2km stage from Reimst to Lanaken and Bert Van Lerberghe (Topsport Vlaanderen), Berden de Vries (Roompot), Alexis Gougeard (AG2R), Chad Haga (Giant), Mark McNally (Wanty-Groupe Gobert) and Luka Pibernik (Lampre-Merida) broke early.
They took a maximum lead of five minutes and were still clear when Chad Haga took all three of the Golden Kilometre sprints with twenty kilometres remaining.
Berden de Vries (Roompot) was dropped two kilometres later, leaving the five to plod on which they did.
Van Lerberghe took the Primus sprint to extend his lead in that competion as the stage went into the final ten kilometres.
The peloton closed in but the break had just enough to stay away and Luka Pibernik took the win ahead of Mark McNally and Bert van Leberghe.
Peter Sagan was unable to claw any time back on Rohan Dennis and the Australian rider for BMC now leads the race from teammate Taylor Phinney by 16 seconds, with Tony Martin (Etixx) third 24 seconds down and Peter Sagan fourth 27 seconds down going into the final stage.
"I didn’t expect this at the start this morning but once in the break, I just rode as fast as I could to the finish line. I’ve not had a lot of time to think about it all but its been an incredible day," Pibernik said to the media afterwards.
"We saw that we could make it to the finish line, so I tried to save as much energy as possible. I think Gougeard was the strongest guy in the breakaway and so I decided to go on his wheel. Then in the last 200 metres, I tried and I made it."