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.
"I was born not too far away. Maybe that is why I get that extra special feeling, scoring here and the times I've played here I have won, so it's been a good place for me, but the main focus was winning and we did that," Mount told Chelsea TV.
"Obviously it's brilliant to get two league wins going into the international break and hopefully we can keep this going."
On his ankle, which was strapped up post-match, Mount added: "It's just precautionary, trying to keep the swelling down. You always get a bit of swelling when you've had an injury, but I'm fine and having four boys going (to England duty), we're looking forward to it and buzzing."