Rooney became England’s all time leading goalscorer on Tuesday when he tucked away a penalty against Switzerland at Wembley.
The goal was Rooney’s 50th, taking him one above Manchester United legend Sir Bobby Charlton.
Smalling lavished praise on his teammate and revealed he will be keeping his shirt from the game as a souvenir from the occasion.
“He’s got no sign of letting up. I think when he finishes his career he’s going to set a marker that’s going to be very hard to beat,” he said.
“It’s a massive honour and I’ll be keeping my shirt to say that I was there when Wayne Rooney broke that record.”
Smalling is absolutely right in saying that Rooney will not be beaten for a very long time. The 29-year-old made his debut for the national side at a very young age and remained in the starting XI from then on.
It is a special moment for Rooney but he and Smalling will now be focused on the game against Liverpool this weekend. Smalling has been superb as of late but Rooney has made an indifferent start in a United shirt this term.