By Kate Mcgreavy For Mailonline
Published: 08:53 BST, 14 September 2020 | Updated: 08:59 BST, 14 September 2020
Former West Ham winger Trevor Sinclair has turned up the heat on the club's owners David Sullivan, David Gold and Karren Brady.
West Ham manager David Moyes kept the Hammers in the Premier League last season but they suffered a 2-0 home defeat by Newcastle in their opening game on Saturday and they have not made a new singing this summer.
Pressure has been mounting on unpopular owners Sullivan and Gold and vice-chairman Brady with some fans supporting the GSB (Gold, Sullivan, Brady) Out campaign.
Trevor Sinclair has turned up heat on West Ham owners David Gold (L) and David Sullivan (R)
Pressure is increasing on the unpopular owners and vice-chairman Karren Brady (above)
He has criticised the board for not backing manager David Moyes in the transfer market
West Ham are only Premier League side not to sign a player and Moyes' side lost at weekend
And now Sinclair, who made close to 200 appearances for the Hammers in five years at the club, has intensified the pressure on the hierarchy at the London Stadium.
He has criticised the board for not backing Moyes in the transfer market, writing on Twitter: 'If you can't or won't back Moyes and invest in players needed then sell. #GSBOUT.'
That Tweet on Sunday night followed his thoughts following the defeat by the Magpies on Saturday evening, where he said: 'Great transfer window for Newcastle and this was a must win for West Ham looking at our fixtures, long season ahead unless signings made.
'If #GSB haven't got the funds to invest in players why not