Chelsea boss Frank Lampard was frustrated by his side's defensive capitulation in Saturday's 3-3 draw against Southampton at Stamford Bridge after the visitors came from behind twice to earn a point.
Timo Werner grabbed a first half double while Kai Havertz scored in the second half as Chelsea's new recruits opened their Premier League accounts but the Saints capitalised on defensive mistakes and stole a point with a late stoppage-time equaliser.
'You go two goals up, you want to finish it off. It was the best we've played this season for sure at this stage,' Lampard told BBC Sport.