The 24-year-old was one of the standout performers on the night.
"It was disappointing," Smalling told MUTV. "For large parts of the game we dealt with all of the crosses and to concede so soon after scoring, from a cross, having defended so well as a team, was really disappointing. It gave them the initiative going forward after that.
"If we could have just seen it out for five or 10 minutes and let the game settle down they would have been chasing it. We felt that as a team we were very compact and the tactics were working well. But it goes out the window when you concede and it gave them that added drive they needed."
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball