Chelsea suffered Champions League devastation on Wednesday evening, crashing out of the tournament after a 3-1 home defeat to Spanish outfit Atletico Madrid.
The Blues were level at half-time until the hour-mark when substitute Samuel Eto’o fouled Diego Costa, who scored the resulting spot-kick.
Jose Mourinho is adamant that this penalty decision cost the Blues the match and therefore the overall tie.
Until the penalty they were not the best team. Until the penalty we had the game, had more possession, had more chances," he told Sky Sports.
"We scored a great goal but we conceded a poor goal. We knew in set-pieces we could have a chance."
"John Terry's header was fantastic and the save was amazing and after that the penalty killed the game. There was only one team. The reality is from that moment the game is lost."
With the score 1-1 at half time, Chelsea had been the superior side and this penalty decision did, in fact, have an impact. From this stage, Atletico went on to dominate the match, with Arda Turan scoring a third to condemn the Blues to defeat.
"At 2-1 against Atletico it is almost impossible and after that there is only one team with high morale, knowing with half an hour to go they have the game under control and the last period of the game was gone."
"Semi-finals and important matches are made of details and this was a big detail with the save and then the penalty that left them in a great condition. But congratulations to them they are a very good side and what they are doing in the Spanish league is fantastic and I congratulate them."
However, the Portuguese Head Coach remained proud in defeat, refusing to condemn his side.
"I can't be critical with the group of players who from day one tried everything.
"We had problems with injuries and suspensions and players who can't play in Champions League and with difficult moments in the Premier League too this group have had difficult moments but I am proud of them. Obviously it is disappointing to lose the second-leg of a semi-final, especially at home - but I can't criticise them for a mistake, we did everything possible for us.”
The English outfit have now faced defeat in a fourth successive Champions League semi-finals under Jose Mourinho. Despite winning Europe’s elite prize with Porto and Inter Milan, he is yet to achieve such success in London.
Atletico Madrid will now face city rivals, Real Madrid, in Lisbon at the end of May. Whilst Chelsea have a Premier League title to spar for. Perhaps domestic success can soften the blow of the Blues’ Champions League exit.