article: Having failed to score in their last six home matches, Saints took the lead after only 10 minutes when Manolo Gabbiadini side-footed past Joe Hart. West Ham's problems then spiralled, as Marko Arnautovic was sent off for elbowing Jack Stephens, before Dusan Tadic made it 2-0 from the penalty spot after Jose Fonte brought down Steven Davis. Summer signing Javier Hernandez thought he had snatched an unlikely comeback for the visitors with two goals from close range either side of half time. But the Hammers conceded a second penalty when Pablo Zabaleta bundled into Maya Yoshida and substitute Austin coolly slotted past Hart. Referee Lee Mason had some important decisions to make throughout the dramatic match at St Mary's - and he got most of them right. Mason was left with little choice but show a straight red to Arnautovic on 33 minutes, after the Hammers' record signing needlessly raised his elbow into Stephens' neck. The Austria international later apologised to the fans for his dismissal. The first penalty was also an easy one to give, as former Saints defender Fonte pulled down Davis, but the second spot-kick in the 91st minute was a more contentious matter. Zabaleta caught a rising Yoshida in the back, as he went to head the ball from close range, and Mason decided the Hammers defender had impeded his Southampton counter-part. West Ham had earlier had a handball appeal against Stephens waved away, while the referee did not punish Mark Noble for his rash challenge on Saints midfielder Mario Lemina, who was making his debut following his £18.1m move from Juventus. Before facing the Hammers, Southampton had not scored on home soil since 5 April - 576 minutes of football. They had 29 shots against Swansea last week, landing only two on target in their goalless draw, so there was a collective sigh of relief around St Mary's when Gabbidani slotted home after Nathan Redmond's through ball. Saints were only able to score from open play once during the match, but Gabbiadini and Redmond both went close with long-range efforts. Substitute Shane Long had the ball in the net in the second-half but referee Mason had already blown for a foul on goalkeeper Hart in the build-up. Media playback is not supported on this device With their home ground out of use until next month following the athletics World Championships, it was always going to be a testing start to the season for West Ham. They started their run of four consecutive away matches with an embarrassing 4-0 defeat against Manchester United last weekend, but put in a much-improved display at St Mary's - even after going down to 10 men. Hernandez, who arrived for £16m from Bayer Leverkusan, lived up to his reputation as a potent poacher with his first two goals for his new club. The Mexico international tapped in West Ham's opener after Fraser Forster parried Michail Antonio's shot into his path, and did the same again for his second goal - this time after Diafra Sakho's header came off the woodwork. Boss Slaven
summary: Ten-man West Ham twice came from behind but Charlie Austin's injury time penalty gave Southampton their first victory under Mauricio Pellegrino.