Enzo Fernandez was booed by Chelsea supporters after coming on as a substitute during the 3-1 friendly win over Real Sociedad on Saturday.
Fans made their opinions on their wantaway star clear when he replaced Reece James in the 62nd minute of the game at Stamford Bridge, though some supporters also gave their backing to the 25-year-old.
Fernandez told the club in May that he wanted to leave. A £120 million ($162 million) price tag was placed on him but, despite interest from Manchester City, no bids were received, and Chelsea consider the matter of his future closed.
Fernandez was the scorer of Argentina’s equalizer in their World Cup semi-final win over England in July before being red carded in the final defeat to Spain.
Record signing Morgan Rogers scored on his first Stamford Bridge appearance, tapping in the rebound after Joao Pedro’s header was saved.
And the Brazilian ensured victory for new manager Xabi Alonso in the team’s final match before their Premier League opener at Fulham a week on Monday, scoring a brace to take his pre-season total to eight, after Jon Aramburu had levelled for the La Liga side.