But having shown promising signs earlier in the season, the midfielder, who was recalled to the England squad last week, offered compelling evidence at Southampton he is nearing a return to his best.
MF Mateo Kovacic, NR - Replaced Barkley for the final 10 minutes of the game and continued where his teammate had left off with a decent cameo of tackling and passing.
Although Southampton should have taken a first-half lead through Ings, who blasted over from just a few yards out, they struggled to match Chelsea's pace and precision.
Barkley scored one and made one for Chelsea.
"I don't think want to end my career here but for now I still feel really good". He had a serious injury in the previous season but he is improving.
'Potentially, he is a great player. "But you have to improve from the tactical point of view, but now he has improved [tactically]". "He will become a very important player, and for the England national team".
He scored the game's opener and assisted a late scoreline sweetener for Alvaro Morata, with the Italian following up on his goal on Thursday night as he slowly works his way into life at the club after an inauspicious beginning.
That proved to be Giroud's last major impact on the clash, as he was hauled off for Alvaro Morata on the 68th minute, with the Spaniard look to build on his midweek goal.
Eden Hazard has so far made nine appearances for Chelsea this season and he has already clocked up seven goals. "I am really happy with him", Sarri said. At the moment for him it's very important to have a lot of training.