Ten-man Chelsea were twice pegged back at home by Swansea as they made a stuttering start to their title defence.
Despite defenders coming back to cover, referee Michael Oliver decided it was a clear goal scoring opportunity and pointed to the spot as well as showing the red card to the Belgium keeper.
In what was an entertaining match both sides played an attacking brand of football and even at the death could never be accused of settling for a point as the first day of the new Premier League season ended with a bang.
The first goal of the game came from Oscar on 23 minutes when the Brazilian whipped in a free kick from out wide and, partly thanks to a Gary Cahill dummy, the ball caught everyone out, ending up in the far corner of the net.
Swansea were level six minutes later though thanks to new signing André Ayew. Jefferson Montero showed great skill down the left hand side, demonstrating some quick feet as he put in a brilliant ball into the box.
The cross found Bafetimbi Gomis, whose header was saved by Thibaut Courtois. The ball then fell to Ayew, who had his first attempt saved, but after a nice touch was able to create some room and slam home the second attempt.
Chelsea retook the lead 92 seconds later through an incredible own goal. Willian received the ball out wide and made a run to the edge of the box, his cross then deflected off Federico Fernandez and somehow looped over Lukasz Fabianski from an impossible position. The Argentine can count himself incredibly unlucky but Chelsea had their lead back.
That all changed ten minutes after the break when Courtois was sent off, giving away a penalty in the process. Gomis had got the benefit of a marginal offside call to go clean through on goal, only to be brought down on his way round Courtois.
Despite defenders coming back to cover, referee Michael Oliver decided it was a clear goal scoring opportunity and pointed to the spot as well as showing the red card to the Belgium keeper. Gomis then stepped up and sent replacement Asmir Begovic the wrong way to level the game once again.
Despite playing half an hour with an extra man Swansea were unable to find a winner as they continued their good recent record of upsetting the big boys on the opening day of the season.
Even outside the four goals today provided lots of drama and action. Before kick-off Chelsea had a scare when Courtois received treatment to his knee and had to go back to dressing room ahead of his team mates to continue getting medical attention, sparking fears he would have to sit out the game.
However, the Blues shot stopper showed no ill effects once the action got underway, much to the relief of Jose Mourinho and co.
The Swans started brightly and Gomis had two good chances in the opening quarter of an hour.
First of all on eight minutes the striker got ahead of Branislav Ivanovic at a corner but his sent header just wide of the far post. He then had a better chance on 15 minutes when he was played clean through on goal, however, despite the chance looking like it deserved a first time strike, Gomis decided to take a touch and turn inside. His touch was heavy and in the time it took for him to recover, Chelsea defenders were able to get back in position.
For the champions, Oscar and Eden Hazard both nearly opened up the visitors. Oscar's excellent play should have been rewarded when he sent a beautifully placed low cross that went right across the six yard box. All it needed was for someone to take a gamble and poke it home but to no avail. Hazard was also on song in the second when he showed good skill, making a powerful run towards goal but his shot was well saved at the near post by Fabianski.
Swansea were the better side in the second half before and after the sending off and in both halves had opportunities to score more. However, on balance a draw would be a fair result as both teams played their part in an exciting season opener.