Celtic picked up their first Champions League point but were once again left to rue missed opportunities as they drew 1-1 with Shakhtar Donetsk
They made a blistering start in Warsaw and took an early lead when Artem Bondarenko turned Reo Hatate's ball into his own net
Ange Postecoglou's side continued to dominate, but a quick counterattack saw Mykhailo Mudryk pull Shakhtar level
That sparked the Ukrainian side to life and former Hoops winger Marian Shved had the ball in the net again before half-time, but it was disallowed as the ball went out of play before Mudryk's pass
Celtic dominated the second half but, just as they did in the early stages of their 3-0 defeat to Real Madrid last week, they passed up chances and failed to find a winner
Postecoglou's team now have one point from their opening two matches in Group F while Shakhtar Donetsk move onto four
The Ukrainian side, who have been displaced from their home stadium since 2014, attracted a near capacity crowd of close to 30,000 in Legia Warsaw's stadium but the vast majority of noise came from the away fans
There was no minute's silence for the Queen following discussions between both clubs and UEFA but both sets of players wore black armbands
Matt O'Riley played in Kyogo Furuhashi in the opening minute but Shakhtar goalkeeper Anatoliy Trubin got a foot to the striker's shot to divert it wide
Greg Taylor's driven cross was deflected just too far in front of the Japan forward and O'Riley had an effort saved before Celtic took the lead in the 10th minute
Josip Juranovic's diagonal ball found Sead Haksabanovic, who was making his first start for the club
 The winger fed Hatate's forward run and the midfielder's shot took a deflection off Artem Bondarenko and went in
 Furuhashi could have tapped it home but chose to leave it only for it to be credited as an own goal
Celtic continued to cause Shakhtar numerous problems with their passing and movement but they levelled out of the blue
A pass inside former Legia right-back Juranovic gave left-winger Mudryk a clear run at goal and he fired high into the net
The goal gave Shakhtar a major lift and former Celtic winger Marian Shved soon had the ball in the net
 Shved, who only made three appearances for the Hoops, was denied his dream goal by an offside flag against Mudryk
Joe Hart then parried Shved's curling effort before Celtic got the chance to regroup at half-time
Celtic again started well and Jota's curling effort was spilled seconds after the restart but Shakhtar cleared the danger
The Portuguese winger twice came close to scoring memorable goals but had shots blocked at the end of impressive mazy runs
O'Riley threatened on a number of occasions and his replacement, David Turnbull, shot not far over from 25 yards
Daizen Maeda saw an acrobatic effort diverted wide and another substitute, Giorgos Giakoumakis, missed Celtic's best chance for a winner with five minutes left
 Taylor's pass picked out the normally accurate Greece striker unmarked but he fired his left-footed shot wide from 14 yards
Maeda also had a good late chance but the Japan attacker fired wide as he slid to meet Juranovic's driven cross
Giakoumakis then beat the goalkeeper to a cross but his header did not have enough power to get away from a retreating Shakhtar defender, who stopped it from going over the line
"The performance was excellent, obviously the score was not reflective of that
"The players gave everything and that's all I can ask for
 Obviously, we needed that second goal and we had good chances to get it, but from my perspective, I can't ask any more of them
"We'll get our rewards if we keep playing that kind of football and showing that kind of commitment
"It's the highest level of club football and every game is pressurised and I just thought there was a real growth in our team in the way we handled it all
"You definitely have to earn everything at this level
 Every point, every win will take maximum effort from us
"October 5:  (A) - kick-off 5:45pmOctober 11: (H) - kick-off 8pmOctober 25:  (H) - kick-off 8pmNovember 2:  (A) - kick-off 5:45pmCeltic's next game is away to St Mirren in the Scottish Premiership on Sunday, live on Sky Sports; Kick-off 12pm
 Their next Champions League fixture is away to RB Leipzig on October 5
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