England manager Roy Hodgson was at St Mary's on Saturday to witness the attacking midfielder's man-of-the-match display in the 4-1 defeat of Hull in which he scored an exquisite solo effort.
"Someone did mention [Roy was in the crowd] but it is one of those things you have to try and put to the back of your mind and concentrate on your job," Lallana, an unused England substitute against Ukraine last year, said.
"Every time I play I just want to go on to the pitch and enjoy my football and play to the best of my ability, help the team get three points.
"I feel like I am playing with freedom and confidence at the minute, as the team is, and that is one of the main reasons why we are getting these good results."
Asked if the last few days have made this the best week of his career, Lallana said: "I think so, but I just want to keep my feet on the ground and keep working hard.
"I want to enjoy my time away with England and hopefully, if I get some minutes, try to impress."
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