The Swede Larsson said: “I was happy with my fitness and sharpness but I can’t get carried away.
“One swallow doesn’t make a summer and I know I need to keep working hard and improving.
“The last time I had played was the start of December so I know I need to work hard and full fitness will come.
“I want to play as big a part as possible while I’m with this great team.”
He added: “We (Wayne Rooney) had some nice little combinations and we were able to find each other at important moments.”