Hernandez emerged from the bench to attain an important equaliser within the 1-1 draw at Chelsea on Sunday. Marko Arnautovic then had West Ham's first chance from Arthur Masuaku's beautifully weighted ball over the top. The Mexican striker was only introduced into the game three minutes before his goal, replacing Edimilson Fernandes.
Willian then twice came close to giving his side the lead.
A tribute to the late Ray Wilkins was held before the match.
Replacement Charlie Austin seemed to have earned a point for the visitors on 73 minutes before Welbeck popped up with an 81-minute header to see Arsenal home 3-2. "It was one cross from Marko [Arnautovic] that I didn't run that probably, if I make that run, I could just tap in". He tipped over Marcos Alonso's shot on the turn from 18 yards out on 79 minutes and made a more routine save from Hazard's angled strike from the right seven minutes later.
Released by Chelsea at 14.
The 30-year-old is in danger of losing his England spot after being dropped by West Ham earlier this season, but he insists he is not thinking about this summer's World Cup. David Moyes made a correct call in switching to two forwards up front with Joao Mario supporting them from behind. We'll struggle and provides the whole lot for the three factors which might assist us get out of the relegation struggle utterly'.
Chelsea manager Antonio Conte: "I think with this game we can see our season".
West Ham managed to equalise in the second half with an excellent strike from Javier Hernandez, which might have saved West Ham from relegation.
"They are the champions, let's not forget". Chelsea and West Ham are on opposite sides of the capital and the Premier League table, but they were even on Sunday.
"Sometimes I cannot score against another team and sometimes I keep scoring, against Chelsea for example".
He was unable to add to his six clean sheets in 17 career appearances against the Blues, but there won't have been many games more satisfying for the experienced stopper since joining the Hammers.
EA SPORTS™, the Lead Partner of the Premier League, has teamed up with Yahoo Sport to offer one lucky reader a pair of tickets the big game. The Spaniard couldn't catch a break all afternoon, however, with two goals ruled out for offside.
The best came when Long cut the ball back for James Ward-Prowse, whose shot beat goalkeeper Petr Cech but was blocked by former Saints defender Calum Chambers.