The winger went down under a challenge from Marvin Zeegelaar, who appeared to accidentally step on his arm during the second-half at Vicarage Road.
The new West Ham manager brought up his 500th Premier League game in his first outing as Hammers boss against Watford
David Moyes takes charge of West Ham for the first time as the Hammers head to Watford in Sunday's one and only Premier League fixture. ADAM SHERGOLD has it live.
David Moyes has warned he does not want to hear any "excuses" from West Ham players and said there will be "no shortcuts now".
• New manager looks to halt club’s slump at Watford• Stuart Pearce ‘will play a big role’, says MoyesDavid Moyes has denied that taking over from Slaven Bilic at West Ham represents his last chance in...
David Moyes held a brutally honest meeting with his West Ham players ahead of today's game against Watford, warning them no-one is safe from the chop if they do not pull their weight.
David Moyes says Stuart Pearce can fire up West Ham's under-performing players and their disillusioned fans as the new Hammers boss looks to turn around slow start to the season.
THE NUMBERS GAME - KIERAN GILL: Against a soon-to-be relegated Fulham side in February 2014, Manchester United managed a total of 81 crosses at Old Trafford.