By Dominic Toner

Ian Wright believes that West Ham’s failure to strengthen in the transfer market has caused their poor form.

The Hammers have endured a horrific start to the new season and have lost their last four consecutive league games.

Slaven Billc’s side currently sit in the relegation zone with just three points from their opening six matches.

The Sun reported on Monday that Bilic must win at least one of the matches against Middlesbrough, Crystal Palace or Sunderland to stay in charge at the London club.

Arsenal legend Wright has explained that West Ham failed to make enough quality signings to improve their squad, with injured star Andre Ayew the only notable recruit.

“Yes, they spent £20 million on Andre Ayew, and were hugely unlucky when he was injured in the first game,” he wrote in The Sun. “And after such a brilliant time of it in the previous season, Aaron Cresswell has been a massive miss as well.

“But where was the real eye-opening signing in the summer? Where were the big names that could have made sure last year was just a platform to great things? Yes, they spent £53m, but nearly half was on Ayew and the rest was frees, loans, bits and bobs, here and there.”

West Ham finished seventh-placed last season and were one of the league’s surprise packages.

They have struggled to build upon their success this campaign and have already been eliminated from the Europa League by Romanian side Astra Giurgiu in the qualifiers.

Bilic managed to make a host of signings in the summer, including senior additions Simone Zaza, Arthur Masuaku, Sofiane Feghouli, Havard Nordtveit, Edimilson Fernandes and Ayew.

Italian international Zaza is one of the club’s signings who has been heavily criticised this season, with the striker failing to score in his first four appearances.

West Ham’s drop in form has coincided with their move to the London Stadium and they are under severe pressure to turn their form around.

Injures to Ayew, Aarron Cresswell and Andy Carroll have certainly weakened the starting line up but the players face a crucial next set of fixtures.

In other West Ham news, the club’s fans are concerned that their star player could leave following the defeat to Southampton.