FC Barcelona are reportedly considering a surprise move for a Chelsea star.
The Catalans are said to be looking for a new left-back, with Junior Firpo expected to leave the club in the near future.
The 24-year-old has started just once in LaLiga for the Blaugrana so far this season, and has failed to live up to expectations after being brought in as a potential long-term replacement for Jordi Alba.
Barca have reportedly been tracking Valencia's Jose Gaya as the ideal signing, but they are also weighing up the potential of signing Marcos Alonso from the Blues if they fail to get their man, according to Mundo Deportivo.
Gaya is the younger of the pair and is seen as a long-term acquisition, but with Alonso being behind both Ben Chilwell and Emerson in the left-back pecking order at Stamford Bridge, a deal might be possible.
Chelsea recently appointed Thomas Tuchel to replace Frank Lampard as their manager, though, and the German may want to assess his squad before deciding who he would be open to seeing leave the club.
Although Alonso's lack of game time could allow for a lower transfer fee, the London club holds the cards in potential negotiations as he still has more than two years left on his contract.