Chelsea captain John Terry is angry that his side were not awarded a penalty at the end of Wednesday night's Champions League encounter with Manchester United - but will not speak out for fear of being banned by UEFA.
Patrick Evra appeared to bring down Ramires as the Brazilian midfielder burst through on goal, but neither the referee nor the extra official gave the decision.
Terry believes it was a "clear" penalty but chose his words carefully when discussing the decision of Spanish referee Alberto Undiano Mallenco.
He said: "I think the most frustrating thing for the players is that we can't come out here and be honest about it. We would face possible bans. We're seeing players receiving bans left, right and centre for speaking honestly after games.
"You guys (the media) lose out, the players can't be honest and we end up walking on eggshells. Unfortunately, I can't say more about it but it was a clear penalty.
"Even from 50 or 60 yards away, I could see Ramires got the first touch. After the game, we watched it on the video like everyone else.''
Terry remains confident that Chelsea can make it into the semi-finals by winning at Old Trafford.
"I can 100% see us turning the tie around,'' he added. "We're frustrated with the result and losing the game but the manager stressed after the game that it's only half-time and we're right in the tie. It's disappointing as we were at home.
"We expected a better performance considering we were at home but we've got the quality to go up there and win the game. We did it in the league last year. They know we're still in it and we certainly do as well.
"We're also still in the title race - we realise we're many points away but we've got one of the strongest squads in the league and everybody is now fully fit.''
Petr Cech has claimed it was 'Groundhog Day' for Chelsea after suffering another controversial Champions League defeat.
He said: "I don't want to speak about it because, every year, it is the same thing. We are obviously disappointed because everyone could see the incident. The main point is that the person who matters most is the referee and if he doesn't give it, you don't get the penalty and that's what happened.''
However, Cech insisted Chelsea had themselves to blame as much as Spanish official Alberto Undiano Mallenco.
"We lost the game 1-0, which is not only because of that - it was because we didn't get a goal anyway throughout the game,'' he said. "We created enough to score a goal and that's what made the difference. We had plenty of shots on target and we didn't score.''
United have never lost a European tie after winning the first leg away and Cech knows Chelsea faced an uphill task in Tuesday's return at Old Trafford.
"When you are losing 1-0 at half-time in the tie, you can still win it, even though you have to play away,'' he said. "Now the result means that we allow them to play the same type of game at Old Trafford. They will defend and wait for the counter-attack and wait for their chances.
"That is their main strength and it makes the tie difficult for us. We go there and we will have a go. We want to do better and win every game - we would like to have a perfect performance all the time but that is very difficult to do. We know that everybody gave everything.
"It was not the best of performances but we know we have to go there and perform well to get something out of the game.''
Frank Lampard has urged Chelsea to unleash the burning sense of injustice in the second leg.
"We can't really think like that too much because it's negative thoughts,'' he said. "We just use it to motivate us, really.
"Everyone knows it was a penalty, but he didn't give it - simple as that. I can't believe he didn't give it. It was blatant - everyone in the stadium saw that.''
Mallenco is the same referee who disallowed Chelsea a Champions League goal at Juventus two years ago, despite the ball being a whole foot over the line.
Lampard said: "Things do sometimes go in your favour and sometimes they don't. It seems in the Champions League that we've had some bad luck.''
As well as the penalty incident, Lampard was desperately unfortunate not to equalise when Evra cleared his shot off the line, but otherwise Chelsea found chances hard to come by.
"We didn't play as well as we can do,'' Lampard said. "That's probably what I'd look at mainly rather than the decision. You wanted to keep a clean sheet and you wanted to try to win the game at home, so it's not the result we look for.
"But it's half-time and we have to remain confident that we can go and win, as we've done before at Old Trafford.''
Chelsea have a better record there than almost anyone, clinching a 2-1 victory in what proved a Premier League title decider last season.
"We know we can win there but, obviously, it makes it a bit more difficult,'' Lampard said. "Ideally, you get a result at home, in front of your home fans. But it wasn't to be. So we've made it a must to go and win there.
"People will make Man United favourites and probably rightly so, considering they've won at our place. But we're certainly still in the game and we've got a belief in ourselves that we can go there and win.''