MANCHESTER, England - Chelsea can open up an eight-point lead over Manchester City for the second time this season by beating its Premier League title rival on Saturday in the most pivotal match of the campaign so far. Having worked so hard in December to get back on level terms with Chelsea, City has allowed Jose Mourinhos team to pull clear again after drawing at Everton and losing at home to Arsenal in its last two league games. For City manager Manuel Pellegrini, nothing less than a victory will do at Stamford Bridge. We must close the gap to two points, Pellegrini said. Throw in a home loss to second-tier Middlesbrough in the FA Cup last weekend and Citys form has plummeted — despite star striker Sergio Aguero being back in the side after injury. Chelsea was also humbled in the FA Cup on Saturday — by third-tier Bradford — but recovered quickly by beating Liverpool on Tuesday to reach the League Cup final. That win was marred, however, by Chelsea striker Diego Costa stamping on an opponents leg, leaving the Spain international facing a three-game ban that would rule him out of the City fixture. With question marks also hanging over the fitness of key centre midfielder Cesc Fabregas, who came off with a hamstring injury against Liverpool, Chelsea could be without arguably its two best players this season. Another sub-plot is the return of City midfielder Frank Lampard to Chelsea, for whom he played for 13 years and where he is the clubs record scorer with 211 goals. Lampard came off the bench to score Citys equalizer against his former club in a 1-1 draw in September, and didnt celebrate his goal. Here are some other things to know about the 23rd round of matches in the Premier League: ___ NO IVORIANS FOR CITY Ivory Coasts progress to the knockout stage of the African Cup of Nations on Wednesday was bad news for City. It dashed any faint hopes the champions had of having star midfielder Yaya Toure and new signing Wilfried Bony available for the game against Chelsea. City hasnt won since Toure, the teams driving force in midfield and a regular source of goals, left for international duty. With Aguero searching for full fitness after more than a month out injured, goals have suddenly become a problem for City, which has scored only once in three games. ___ FORMATION FORMULA Manchester United manager Louis van Gaal must decide whether to stick to his preferred 3-5-2 formation or go with a 4-4-2 set-up demanded by the clubs increasingly frustrated fans when the 20-time champions host Leicester on Saturday. Van Gaal says he finds it uncomfortable to watch United when it plays four at the back, but results show the team is more effective when it lines up in that formation. He changed to a 4-4-2 midway through Uniteds last league game when the score was 0-0 against Queens Park Rangers — and the move paid off in a 2-0 win. United has won only two of its last six games in all competitions, and is reeling from being held 0-0 by fourth-tier Cambridge in the FA Cup on Friday. ___ ARSENALS ATTACKING RICHES A torrent of injuries has deprived Arsenal of so many of its best players this season. Now, though, manager Arsene Wenger has a very different kind of selection dilemma. With Theo Walcott, Mesut Ozil and Aaron Ramsey back after long-term problems and playmaker Tomas Rosicky in brilliant form, Wenger has a wealth of attacking riches at his disposal as his fifth-place team looks to climb back into the Champions League positions. Arsenal — with four straight wins in all competitions — is one point behind United going into the weekend, when it hosts struggling Aston Villa on Sunday. ___ THE PULIS EFFECT Want a sure way of avoiding relegation from the Premier League? Hire Tony Pulis. West Bromwich Albion had slumped to within a point and a place of the relegation zone and was on a run of just one win in 10 matches when it appointed Pulis as a replacement for Alan Irvine at the start of January. Pulis has never been relegated in his 23 years as a manager, and kept Crystal Palace up last season after taking over a team bottom of the Premier League. And he is already working wonders at The Hawthorns, with West Brom winning three and drawing the other in his four games in charge, conceding one goal. On Saturday, West Brom hosts Tottenham, which is fresh off reaching the League Cup final. Tavon Wilson Jersey . As deep as their roster is, they need their superstar. Rose scored 23 points in his return from a five-game absence due to back pain, and Chicago hung on to beat the struggling Atlanta Hawks 90-79 on Monday. LeGarrette Blount Jersey . - Bryan Price sat down in the cushy chair. http://www.officialdetroitlionsfootball....e-jersey-womens. They showered him with "MVP! MVP!" chants. In many ways, it seemed like hed never been gone. Detroit Lions Jerseys . At this rate, the Flyers captain is set to be remembered more for a fantastic finish. Jarrad Davis Jersey . Colorado came up big against Chicago last spring, and repeated that performance Tuesday night. Varlamov stopped 36 shots and Paul Stastny had a goal and an assist for the Avalanche in a 5-1 victory over the Blackhawks.David Moyes and Malky Mackay have both put their names forward in connection with managing Celtic, should either be approached in the future. The former Celtic defenders are both unemployed and are taking their time over returning to management roles.Celtic are currently chasing a league and Scottish Cup double under current boss Ronny Deila, who picked up two of the three available domestic trophies last season. But a poor Europa League campaign on the back of Celtics failure to qualify for the Champions League has put Deila under extra pressure this season.Deilas future is a constant topic of discussion in the media, and two Scottish broadcasters again raised the subject on Tuesday. David Moyes in action for Celtic in 1980 Moyes was asked by a regional broadcaster if he would consider a return to the Hoops, and the former Preston, Everton, Manchester United and Real Sociedad boss hinted that only financial restrictions would be a stumbling block.Everybody knows my time at Celtic was great. I was a young player and played with great players at Celtic. Celtics been a great llove of mine, Moyes said.dddddddddddd.Who knows, who knows, I would never say never but obviously Ive got ambitions to win things.Id want to be at a club that would give me every chance to win and be involved in the Champions League and be at the top level.Im saying this with total respect but I dont think the Celtic squad is good enough to reach the levels that they want. Thats a no-brainer if you ask me. Former Celtic defender Malky Mackay playing for the team in 1998 Meanwhile, Mackay informed Scotlands national radio broadcaster that managing Celtic would be his dream job, should the former Cardiff boss ever be given the opportunity.Of course it is, Mackay said. Its a fabulous club. But Im loathe to talk about specific clubs, particularly when managers are in place, because it happened to me.Its not nice when you hear vultures touting for your job. That has a lack of class. 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