Olympiakos 3 Burnley 1: Ben Gibson sees red to leave Sean Dyche’s side on the brink of Europa League exit
Chris Wood's penalty levelled the tie and looked to have secured a vital the Clarets a vital away goal to take back to Turf Moor before second half collapse
But Dyche’s plucky underdogs were soon level after Chris Wood fired home from the penalty spot — the first awarded to them in 45 games.
The Kiwi, 26, won it after being nudged in the back and stepped up to fire low and left past Andreas Gianniotis for an invaluable away goal.
And with the wind in their sails, Wood almost doubled the lead just before the break but nodded just wide after a pinpoint cross by Jóhann Guðmundsson.
But it was a nightmare start to the second half as the Greeks doubled their lead.
After a devilish free-kick from Fortounis, midfielder Bouchalakis evaded Jack Cork and glanced a header past the hapless Heaton.
And things only got worse for Burnley after that.
Ben Gibson was given his marching orders for a second yellow after a handball in the area, and Fortounis, 25, converted from the spot to put Burnley on the brink.
A man down and two behind, Dyche was between a rock and a hard place.
They dug in with two banks of four, praying on holding out without anymore damage to the scoreline.
It was nervy and Olympiakos had chances to make it four and put the tie to bed.
But they hung on and almost grabbed themselves the all-important second goal after Sam Vokes prodded home, only for James Tarkwoski to be given offside.
Burnley fan is struck in face with ball during warm-ups ahead of Istanbul Basaksehir clash