Manchester United and Manchester City are going head-to-head for Benfica star Nicolas Gaitan.

The Sunday Mirror says the two Manchester clubs are set to wage a £25million war for Argentina winger Gaitan.

Both United and City will watch the 24-year-old in Lisbon for the Champions League ­first-leg tie against Chelsea on Tuesday.

"We believe that Nicolas is going to England in the summer," said a Benfica source.