The midfielder, who was born in Portsmouth, grabbed the second goal for the Blues in a 4-1 win and enjoyed celebrating in front of the home supporters at St Mary's.
Cesar Azpilicueta says that he knew Tammy Abraham was ready to make an impact for Chelsea this season, with the young striker taking his tally to nine in all competitions after scoring against Southampton on Sunday.
They are fifth in the PL and are back on track in Europe as early defensive struggles haven't quite evaporated, but this Chelsea side are looking well suit compared to Tottenham, Arsenal and Man United in terms of pushing for a top four finish this season.
"I did the best I could with the minutes I got".
"If we can keep going with that then, yes, we will be challenging right up there I hope".
Lampard echoed Mount's sentiments about finishing strongly before his players left Cobham to link up with their national teams.
Abraham opened the scoring on the south coast with an excellent lob over Angus Gunn after racing on to Callum Hudson-Odoi's fine through ball in the 17th minute.
Since im waka come from Borussia Dortmund go Chelsea for the close of last season, Pulisic don start three Premier League games and Frank Lampard no bother to put im name for the squad when Chelsea kpokpo Lille for the Champions League last week.
"One of my problems in this job is that I have good players and everyone has their story", Lampard said before the game.
Tammy Abraham has been a revelation at Chelsea and has already scored 8 goals in his 8 appearances for the Blues in the league.
"The outside opinions don't matter as much to me as to what's in the team and myself and the people who care about me". We all need to look at it. "He deserves this great week and deserves this start to the season, but I'll keep on him because I want more".
Now in the league, sides are struggling away from home, but Chelsea are controlling games outside of West London as if they're at home, scoring eight times in the first half of those games.