The goal cancelled out a Burnley equaliser just five minutes earlier which had been as controversial, to Chelsea eyes at least, as it was fortunate. - Two of Chelsea's last eight goals in the Premier League goals have been own-goals (Kevin Long tonight and Martin Kelly for Crystal Palace) - their previous two came across a total of 167 goals.
Not only did Chelsea fail to add more depth to their squad, they crucially failed to replace two key players, Diego Costa and Nemanja Matic.
"Maybe when we play with three midfielders, it's better for him because he has the possibility to attack the box".
Chelsea boss Antonio Conte says it is a 'fantastic story' that Arsene Wenger spent so long in charge at Arsenal.
"But the only way is to keep hope until the very end and try to play with the same desire and will we showed against Burnley and in the second half against Southampton".
Chelsea and Southampton will tangle for the second weekend in a row, and this time the stakes are very different.
Chelsea didn't let that equalizer stop them.
It is almost certainly too little, too late to affect their top-four ambitions though at least it highlights a benign spirit within the squad.
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Chelsea dominated and took the lead in the 20th minute when Long deflected the ball into his own net after good work on the right by Moses.
"Maybe with this desire, this fight to reach a good result, we have a possibility [of securing fourth place]".
Look at the likes of Liverpool.
Morata appeared to react angrily after being substituted in the 71st minute at Turf Moor but Conte insisted the Spaniard was simply angry at having missed some key chances, most notably when he curled the ball around the post when one on one with Burnley goalkeeper Nick Pope. "We need to defend properly and be a threat the other way".
However for me, one HUGE blunder is not replacing John Terry.
Sean Dyche named an unchanged side as Burnley looked to move above sixth-place Arsenal with a sixth straight win.
Chelsea's title defence never really got off the ground this season and they remain five points off the top four despite beating Burnley on Thursday but Giroud knows the importance of fighting for cup success.