Sunday night's English Premier League programme promises some belated Christmas crackers, with six of the top seven in action against each other and West Ham and Southampton - two of the surprise high-fliers - having a chance of a big upset. The best chance of one of the big six being overturned is at Upton Park, where West Ham host Arsenal. The table says the Hammers have been the better team this season and their record is solid enough to give them a good shot. The best chance of one of the big six being overturned is at Upton Park, where West Ham host Arsenal Teams can gain a high position in the table by beating up lesser opposition and then come undone when they meet the better teams, but that does not appear to be the case with West Ham. They have won their past four home games against top-half teams, including Manchester City and Liverpool, and their defeats in that category came early in the season against Tottenham and Southampton. It can be argued that those early games might turn out differently if they were replayed now, as Sam Allardyce's team have found an impressive style and confidence once they got used to the reshaped formation and personnel. Since losing to Southampton in their third league game of the season, West Ham have lost only three times more in 15 games (all away to good opponents). At home the Hammers have taken 19 points out of 21 since the Southampton defeat. Arsenal remain a class above West Ham in terms of star players and squad depth, but there is still a question mark over their form in big matches. They have won only two out of eight against teams in the top half of the table and both were at home. On the road their only wins have been at Aston Villa, Sunderland and West Brom - all relegation-threatened teams. Arsenal's away record against top-half teams shows only one point from three matches and recently they have lost at Swansea and Stoke, who have vastly different styles of play. The current West Ham side combine the best of Swansea's passing style and Stoke's effectiveness in aerial duels, which suggests they can pose plenty of problems for Arsenal. The best bets are West Ham on the handicap and over 2.5 goals. Southampton, in contrast to West Ham, have found it difficult to pick up points against the better teams. Last season, when they did so well under Mauricio Pochettino, Southampton won only two out of 14 against the top seven teams and the pattern has remained the same for new boss Ronald Koeman. The Saints were flying until they encountered a tough run of fixtures against other top-seven teams but in that category they have lost four out of five - the sole win was away to West Ham in August and arguably that came too early for the Hammers to show their true form. Southampton are good enough to trouble Chelsea but at the odds the league leaders rate a decent bet. Jose Mourinho will have planned this Christmas campaign down to the smallest detail and he has already taken maximum points from two tricky matches (both 2-0) away to Stoke and home to West Ham. A similar low-scoring win is the likely outcome. Tottenham winning at home to Manchester United would be an underdog victory, but they have a good chance. United are being talked up as potential title challengers after taking 22 points from the past 24 but their away form remains weak and they could come unstuck at White Hart Lane. Just as United have responded to Louis van Gaal's methodology, so Tottenham are showing better form for Pochettino with five wins in their past seven league games (the only defeat in that run was at Chelsea). It is notable that they have won four in a row in all competitions since the start of their break from the Europa League and this looks a good time to back them. United have won only two out of eight on the road and, although those victories came recently at Arsenal and Southampton, they could easily have lost those games. They have kept only one clean sheet on the road and that suggests a good chance for Spurs. Tottenham rate the best bet on the handicap and over 2.5 goals is worth considering too.