Dinamo Zagreb goalkeeper Dominik Livakovic is being tracked by Manchester United.

The Sun says a United scout was in the crowd to see Livakovic keep a clean sheet for Dinamo Zagreb in Thursday's 2-0 win over Norwegian side Rosenborg in the Champions League Play-Off first leg.

And if David De Gea does not sign a new Old Trafford deal, the highly-rated Croatia international is a candidate be the club's new No 1.

De Gea is yet to put pen to paper on an improved contract that was agreed weeks ago, increasing fears that he will leave on a free transfer next summer.

Livakovic, 24, would cost between £15m and £20m.