Manchester City have enjoyed a flawless season so far, sitting 15 points clear at the top of the Premier League table having won 20 of their 22 league games.

But the wheels may be about to come off their season in spectacular fashion.

Alexis Sanchez, a player coveted so badly at the Etihad Stadium that Manchester City have spent the past two transfer windows pursuing him, now looks set to join Manchester United.

And Spanish outlet Diario Gol say Aguero is now giving serious thought of leaving City and moving back to Spain with Real Madrid.

Aguero left La Liga in 2011, turning his back on Atletico to move to England.

And seven years on the Argentina international has established himself as one of the best players in the top flight.

Aguero is City's all-time leading scorer having broken Eric Brook's record against Napoli earlier in the season.

Diario Gol say that, consequently, the player feels he is ready to pursue a new challenge elsewhere.

The striker is said to be keen to play for Real, whose need for new attackers is growing more evident by the game.

Cristiano Ronaldo, Gareth Bale and Karim Benzema have all toiled, with Real consequently falling 16 points behind Barcelona at the top of the table.

However, Barcelona star Lionel Messi is attempting to talk Aguero out of a move.

The two forwards are team-mates at international level with Argentina.

Whether Aguero heeds Messi's advice, however, remains to be seen.