He wants to stay high on the pitch and he's been a real success for them
Martin Keown
“Alonso is different class down the left,” he said on Match of the Day.
“They changed their formation this year to adapt but no-one seems to have told him as he is flying own the left hand side even more than when he was a left wing-back.
“We know what he can do, he has scored lots of goals.
“He wants to stay high on the pitch and he's been a real success for them."
Martin Keown believes Marcos Alonso has excelled for Chelsea (Image: GETTY)
Premier League: Mariner predicts Chelsea and Liverpool wins
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Blues boss Maurizio Sarri believes Alonso may be the best left-back in Europe.
He said: “Alonso I think at the moment in this position, left-back, he is maybe the best in Europe.
"Physical qualities at top level, I think. He's doing very well in the offensive phase.