The Spaniard has impressed as part of Conte’s 3-4-3 formation, playing as a left-wing back.
He has netted five goals and two assists in the league, helping Chelsea establish a seven-point lead at the top of the table.
Marcos Alonso has impressed in his debut season for Chelsea
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And former Liverpool midfielder Redknapp believes the 26-year-old hasn’t quite got the praise he deserves this term.
Although he feels he wouldn't have had the success he has had if he was playing in a regular back-four.
“Marcos Alonso is Chelsea’s unsung hero,” Redknapp told the Daily Mail.
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“When he signed, it looked like he was a stop-gap to allow Antonio Conte to play three at the back.
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Antonio Conte's 3-4-3 formation has suited Marcos Alonso
“Alonso would be exposed in a back four but in Conte’s system he can hurt defenders with his galloping runs, knowing that Gary Cahill is covering him.
“He pips Danny Rose to the left wing back position in my team of the year.
“Just two defenders have scored more league goals than Alonso this season and his fantastic free-kick killed off Bournemouth.
“The way Alonso’s team-mates stepped aside for him to take it shows their confidence in him.”