Manchester City have reportedly joined Manchester United in the chase to sign Benfica winger Nicolas Gaitan.
The Premier League rivals will both have scouts at Stamford Bridge for the first leg of the Portuguese club's Champions League quarter-final against Chelsea on Tuesday.
The Argentine is thought to have a €40m (£33m) buyout clause in his contract, according to The Mirror.
However, Benfica will be willing to accept half of that fee at the end of the season.