West Ham manager Sam Allardyce conceded that his side are suffering from a psychological problem after Marko Arnautovic's 95th-minute equaliser saw the Hammers drop points for the second game in a row. Allardyce's side had been on track for their first back-to-back home wins in almost four months but having already had two goals ruled out for offside, Arnautovic eventually punished the fading hosts to earn a draw. Aaron Cresswell had given the home side an early lead at Upton Park but after a strong start it was Stoke who ended up dominating and they left with a deserved point. Marko Arnautovic (second left) is mobbed by his Stoke City team-mates after scoring a 95th minute equaliser at West Ham United . West Ham (4-1-2-1-2): Adrian 6.5; Jenkinson 6.5, Collins 7, Reid 6, Cresswell 7; Song 7 (Nolan 67 mins, 6); Noble 6, Kouyate 7; Downing 5.5; Valencia 7.5 (Amalfitano 78), Sakho 6.5 (Cole 59, 5.5). Subs not used: Jaaskelainen, Jarvis, Nene, O'Brien. Booked: Collins, Nolan. Manager: Sam Allardyce 6.5. Stoke City (4-2-3-1): Begovic 6.5; Cameron 6, Shawcross 6, Wollscheid 5.5, Wilson 6 (Pieters 49, 5.5); Whelan 6 (Ireland 67), Nzonzi 6; Moses 6.5 (Diouf 44, 7), Adam 6.5, Arnautovic 7; Walters 6.5. Subs not used: Butland, Bardlsey, Sidwell, Crouch. Booked: Pieters . Manager: Mark Hughes 6.5. Referee: Roger East 7. Man of the match: Marko Arnautovic. Attendance: 34,946. CLICK HERE to view our brilliant Match Zone including the move for Marko Arnautovic's 95th minute equaliser for Stoke City . It is the fourth time this year that a late goal has cost the ninth-placed Hammers after draws at Manchester United, Tottenham Hotspur and the defeat at Leicester City last week. Without the late goals they could be above Swansea City and sitting on a club-record 50 points. 'We can't find the right key elements to see that game out. We leave ourselves on a nervous edge,' Allardyce said. 'We are very nervous at that stage over what's happened before and we should be on 50 points now. We've thrown away seven points in two minutes or less in four games. 'If we had concentrated better in those (last) minutes, we would be sitting on our greatest total and finish ever in the (Premier) League. Instead we are scratching our heads on when are we going to finish a game out again. I thought we were going to do it today, but it finished miserably in the end over just a few seconds.' West Ham's performances have dipped since a strong start to the season but there was no sign of any supposed complacency early on against Stoke, and the reawakening coincided with the return of Enner Valencia. It was Stoke's inability to deal with him led to the opening goal after seven minutes. Glenn Whelan tripped Valencia five yards outside the penalty area to give West Ham an opportunity to shoot from the dead ball. Mark Noble looked the most likely candidate and when he stepped over the ball it seemed to leave goalkeeper Asmir Begovic confused. Instead, unlikely scorer Cresswell was the chosen one and he sent the free-kick over the wall and curling into the Bosnian stopper's top left-hand corner to give West Ham the lead with his second goal of the season. Aaron Cresswell (right) attempts to go past Stoke forward Arnautovic during the opening stages of Saturday's encounter . West Ham midfielder Alex Song (right) runs with the ball in midfield as the home side look to record back-to-back home league wins . Cresswell scored the opening goal of the game as West Ham drew 1-1 with Stoke in the Premier League on Saturday . Cresswell (right) gave the Hammers the lead with a free kick on seven minutes after Enner Valencia was fouled . The Hammers left back watches on as his free kick curls up and over the Stoke wall and into the top corner of the net . Cresswell (left) is mobbed by his West Ham team-mates who congratulate the West Ham No 3 on his curled effort . West Ham were well on top, and Diafra Sakho and Cheikhou Kouyate could have added to the lead inside the opening 20 minutes. But as the half wore on it was Stoke who looked the more likely to score. Valencia's influence waned and instead it was Arnautovic who took control, dominating Cresswell down West Ham's left-hand side. Charlie Adam curled an ambitious free-kick over the bar from 40 yards out in search of his second wonder goal in a week before Jonathan Walters silenced an impatient Upton Park with a low strike that looked to have gone in but had instead hit Adrian's side netting. Victor Moses also had an opportunity, bringing down Arnautovic's cross inside the penalty area, spinning and firing in a shot that was deflected just wide. Allardyce would have been pleased just to see his side make it through to half-time unscathed and Stoke went in at the break with a sense of injustice after hearing referee Roger East blow his whistle as they prepared for the latest in a series of dangerous corners. A low-key opening to the second half allowed the home side to settle a bit and they looked the better side until a mistake by Winston Reid gave Adam a chance on the hour mark but a bobble came to the rescue and the Scot shot wide. Stoke manager Mark Hughes (right) shows his emotion on the touchline as his side try to find a way back into the match at Upton Park . Stoke forward Victor Moses (left) fires a shot at goal as the Potters push for an equaliser in the first half at Upton Park . However, that proves to be the Nigeria international's final participation of the match as he injures his leg . Referee Roger East (left) calls for assistance as Moses (bottom) lays in a heap on the pitch in the closing stages of the first half . Moses (centre) hobbles off the pitch with the assistance of two Stoke medics after injuring his leg following his shot . Moses' replacement Mame Biram Diouf (left) is quickly into the thick of the action as he shields the ball away from James Collins . Stoke were dealt a further blow in the second half when defender Marc Wilson (left) had to leave the pitch injured . Stoke midfielder Charlie Adam (left) battles for the ball against West Ham captain Kevin Nolan in the second half . Minutes later Arnautovic had the ball in the net, slotting past Adrian, but his run was correctly flagged for offside. The Spanish keeper's goal seemed to be living a charmed life and particularly so as Stoke went within an inch of equalising. Jonathan Walters sent in a cross from the right that was met by the unmarked head of substitute Mame Biram Diouf, who powered an effort towards goal only to see it bounce off the inside of the post, along the goal line and somehow staying out. West Ham looked like throwing it all away again late on. Arnautovic found Adrian's net for a second time but was again flagged for offside. But the Austrian wasn't to be denied and he eventually scored with seconds left to spark wild celebrations in front of the away end. Stephen Ireland flicked the ball on and Arnautovic applied the finish, slipping the ball into the corner to leave a familiar scene for the home support. Stoke manager Mark Hughes said: 'It looked for a long time that we weren't going to be able to do it. 'When we got into the fourth minute of added on time it looked as though it wasn't going to be our day. Credit to the lads, I thought they were brilliant.' Players from both teams are involved in a heated argument after the final whistle of Upton Park clash on Saturday afternoon . Arnautovic applauds the jubliant travelling Stoke fans who made the trip to Upton Park after the match . West Ham players walk off the pitch dejected after conceding Arnautovic's late equaliser during Saturday's encounter .
Aaron Cresswell gave West Ham United an early lead with a stunning 25-yard free kick on seven minutes .
Hosts were denied all three points after  Marko Arnautovic equalised for Stoke City in the 95th minute .
Arnautovic had earlier seen two goals disallowed for offside during the Upton Park encounter .