By Dominic Toner

West Ham will enter the market for a new defender after Aaron Cresswell’s injury scare, according to a report.

The Londoners announced via their website that they are monitoring an injury to the 26-year-old which he picked up in a pre-season game against Karlsruher SC.

With Cresswell due to undergo a scan this week, according to Sky Sports, manager Slaven Bilic is keen to identify a replacement amid concerns that Cresswell won’t be fit enough for the start of the Premier League season.

A source for West Ham website Claret and Hugh has said the club will enter the transfer market. “We’ll try and sign a top class player,” the source said. “We have always needed a top back up and have gambled for a few seasons – now is the time to go and find that player.”

An extended period on the sidelines for Cresswell could cause major problems for West Ham, with make-shift left-back Angelo Ogbonna the only senior replacement in the squad.

Cresswell was a key player last year in an outstanding season for West Ham, who defied the odds to finish seventh in the Premier League and guarantee European football for this campaign.

The former Ipswich man arrived in East London in 2014 and immediately made an impact, winning Hammer of the Year in his first season.

West Ham loaned out young left-back Stephen Hendrie to Blackburn Rovers last month and now look set to bring in a ready-made defender, rather than recall the Scottish Under-21 international.

In other West Ham transfer news, they will have to pay £14.3million if they want Swansea’s international star.