Ten minutes later, Pedro Mendes doubled their advantage after slotting home from close range as Leca fumbled a well-taken free-kick by Delort.
Lens reduced the deficit in the 36th minute after goalkeeper Jonas Omlin turned the ball into his net – with Seko Fofona’s shot bouncing off his back before sailing into the next.
In the second half, both teams came out desperate of more goals, but it was Franck Haise’s side that levelled matters through Kakuta’s penalty in the 50th minute. Following Omlin’s foul on Fofona, referee Jeremy Stinat pointed to the spot and the former Chelsea man stepped up to beat the opposing goalkeeper.