Olsson feels England have become more difficult to beat as they followed up Saturday's single-goal success over Spain with another 1-0 win.
The West Brom player said: "I thought we did quite well second half, pressed a bit higher, and got hold of the ball as well.
"But this is the way England plays at the moment. They score one and then they defend very solid.
"They are very solid in their shape and defend well. It works for them, defending a lead and not conceding. They do that very well.
"It is difficult to play against but we still created some chances."