Hasenhuttl knows Werner well, having signed the Germany striker while he was in charge of RB Leipzig.
Werner’s international team-mate Havertz also arrived in west London over the summer, with Chelsea paying more than £70m to sign him from Bayer Leverkusen.
‘I knew the moment would come that he scored his first goal in the Premier League. I hoped it would not be against us,’ Hasenhuttl said following the match.
‘When you give him space, it’s hard to defend against him. The first goal we made it too easy for him.
‘It’s tough to defend against him. When you are not tight on Timo and Kai Havertz they will kill you.
‘But I am really happy that Timo is in England and playing in the Premier League.
‘He’s fantastic for the fans, but it’s good we took a point as otherwise I wouldn’t be so happy for him.’
Lampard, meanwhile, urged his Chelsea team to be more clinical after they were pegged back by Southampton.
‘But Southampton are a good side. They put pressure on us off the ball. They put us under pressure after the first goal.
‘My message at half-time was that the goal shouldn’t change too much. We never got to the same levels in the second half. We can do better.’