Celtic have kept their Europa League hopes alive after coming back to defeat Besiktas 3-2 in a breathless affair at Parkhead.
After a dull first half, the game came to life when Junior Olaitan scored on the rebound from a penalty for the visitors.
Needing a response, Martin O'Neill introduced Callum Osmand and Camilo Durán -- and the former got his side level under a minute after coming on.
Durán then made it 2-1 before Orkun Kökçü got the visitors level again, but the Colombian fired in just 84 seconds later to take the points for the Hoops.
Here's how it happened.
O'Neill certainly knows his team are running out of opportunities to revive their league phase campaign.
A 3-1 home defeat to Ferencvaros on matchday one was followed by a 4-1 thrashing at Benfica before Celtic suffered another setback at Parkhead, losing 2-1 to Spanish side Celta Vigo.
Things have hardly been plain sailing domestically, either. Celtic were beaten 2-0 by Falkirk on Sunday, having previously dropped points in a 2-2 home draw with Dundee United. Nonetheless, the Hoops remain top of the Scottish Premiership.
Besiktas, meanwhile, arrive in Glasgow in a considerably healthier position in Europe. Vincenzo Italiano's side are unbeaten in the league phase, sitting eighth with seven points from their opening three matches.
The Turkish club began with a statement 4-1 victory over Marseille, followed it up with an entertaining 3-2 win away at Hoffenheim and most recently drew 2-2 with Crystal Palace.
They'll be looking to forget a 2-2 league draw at the weekend, though, where they squandered a two-goal advantage against Kasimpasa. Leandro Trossard opened the scoring in the 28th minute before Dušan Vlahović doubled the advantage shortly after half-time, but an 87th-minute equaliser denied them the win.