Chelsea are watching Porto attacker Luis Diaz.
The Colombia international was a star during the summer's Copa America and came close to joining Everton before the summer market closed.
A Bola says Chelsea are now scouting Diaz leading up to the January market.
Diaz, 24, has a deal to 2024.
So far this season, the attacker has five goals and an assist in seven league games for Porto.
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