Chelsea also made it five wins from as many games under Maurizio Sarri thanks to the brilliance of Eden Hazard, who scored a hat-trick in a convincing 4-1 win over Cardiff to edge ahead of Liverpool on goal difference.
The comeback was complete a minute before the break as Olivier Giroud's gorgeous cushioned touch freed his team-mate to force a second in off Bamba at close range.
But the Italian is convinced there is still more to come from his star man, explaining that Hazard needs to spend less time looking to take possession off his central midfielders in his own half. "If he wants to play for another season, I think it's right he tries to play". "I think that he can spend less energy than now at 50 or 60 metres to the oppositions goal".
"I have spoken to him in the last two days, yesterday I told him for me he can score 40 goals".
He played 36 times last season for Villa, who were beaten in the Championship play-off final by Fulham.
"I think Hazard can improve more", Sarri added. So, we have a lot of good players, and at the moment we are in confidence, so we shoot, we score.
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If he does renew, then he will likely build a legacy as the club's greatest ever player - with the Cardiff match having been used as a springboard to propel himself from 12th on the club's all-time top-scorer list and into the top 10.
Cardiff has two points from five games.
Liverpool showed their credentials in targeting a first title since 1990 are for real and such was the Reds' dominance the scoreline did not do Jurgen Klopp's men justice in winning 2-1 at Tottenham.
But Sarri insists last season's champions and Champions League finalists remain the benchmark for his side. Playing away at one of the Premier Leagues top clubs, Cardiff would have been forgiven for locking up but they very much played the way they wanted to play. My feeling is that now we are not a very solid team in the defensive phase.
"Now we have to prove that and do it again and again".