LONDON -- Usually Friday night is one the quietest times in the frenzied world of the English Premier League. Players can be found on gaming consoles in hotel rooms on the eve of games, or resting at home in anticipation of a Sunday game. But the pre-game calm will be shattered by the closing of the winter transfer window on Friday, with clubs racing to sign reinforcements or offload rejects for the final time this season. Here are five things to know about the transfer deadline-day and the weekends Premier League matches: CLASH OF THE CHALLENGERSManchester City and Chelsea will be relieved their fixture has been shunted back to Monday, minimizing any disruption for their top-of-the-table meeting. "Its the ultimate test," Chelsea defender Gary Cahill said. "Its going to be a really, really tough game." The City squad hardly needs much tinkering. Manuel Pellegrinis side took its goal tally this season to 115 in all competitions with a 5-1 thumping of Tottenham that took them back to the Premier League summit. At the same time, though, Chelsea was being frustrated by West Ham — drawing 0-0 — and travels to the Etihad three points behind City. The game pits the stingiest defence — Chelsea has conceded 20 in 23 — against the leagues most prolific attack — City has scored 68 in 23. "As a collective unit, as a whole team, were working really hard defensively, not just at the back," Cahill said. Chelsea got the better of City in their last clash, winning 2-1 at Stamford Bridge in October. ARSENAL BLIPBeing knocked off the top has taken the wind out of Arsenals title charge. And after being held at Southampton, the Gunners host a resurgent Crystal Palace on Sunday. "The kind of performance we delivered at Southampton will not move us forward, so lets focus to come back on Sunday and produce a good performance," Arsenal manager Arsene Wenger said. By then will there be any new faces in an Arsenal side looking to produce a first trophy since 2005? Its unclear. "Are we active? Yes. Are we close to sign anybody? No," Wenger said on Thursday. "There is not long now, that is true." Top of the target list is Julian Draxler, but Schalke doesnt seem to be a willing seller. Schalke sporting director Horst Heldt said he was "very convinced" the 20-year-old attacking midfielder will remain at the German club for the rest of the season. Arsenal will be without midfielders Jack Wilshere, who has an ankle problem, and Aaron Ramsey, who faces several weeks out with a thigh injury. LEAKY TOTTENHAMTottenham was brought down to earth with a bang by City on Wednesday as Tim Sherwoods unbeaten start as manager in the league ended. The north London club, which has conceded 11 goals to City this season, has what seems to be an easy trip to Hull on Saturday. "We have to be positive because we are still fifth, three points behind Liverpool," goalkeeper Hugo Lloris said. "So it is open. We just need to be focused." NORTH-EAST DERBYNewcastle is preparing for the derby against Sunderland on Saturday still trying to replace Yohan Cabaye, having received more than $27 million for the midfielder from Paris Saint-Germain this week. Manager Alan Pardew is waiting for a bid for Lyon midfielder Clement Grenier to be accepted. "He has tremendous creative technical ability," Pardew said. Sunderland, which is out of the relegation zone for the first time since August, signed Argentina striker Ignacio Scocco on Thursday from Internacional. MOYES EYES MOMENTUMManchester United is chasing its first back-to-back league wins in a month when the champions face Stoke on Saturday still in seventh place. David Moyes push for the top four is being helped by how easily record-signing Juan Mata slotted into the team for a 2-0 win over Cardiff on Tuesday after joining from Chelsea. "Juan looked like he had been here for years," winger Ashley Young said. "He had only been training for two days and it was his first game but he has gelled straight away." Air Jordan Discount . According to Tony Barrett of The Times, the Liverpool captain is set to announce that he will leave the club at the end of the 2014-15 season. Cheap Jordan From China .com) - Colorado Rockies shortstop Troy Tulowitzki was named the National League Player of the Month for April. https://www.jordanchina.us/ . Neither made it that far in 2013. Not even close. Federer lost his second match at the All England Club. Nadal exited in the first round, a year after bowing out in the second. Jordan China . The 26-year-old Redditch, England, native played three of his past four seasons under Rennie with the Carolina RailHawks of the North American Soccer League. Air Jordan Outlet .com) - The Miami Heat stopped a four-game losing streak last time out and thats the same length slide their opponents Wednesday night, the Denver Nuggets, will try to halt when the two teams meet at the Pepsi Center.Saracens lock forward Alistair Hargreaves has retired from rugby with immediate effect following a concussion injury. Hargreaves made 79 appearances for Saracens over four years, leading the club to the Premiership title in 2015. Win the Rugby Trip of a Lifetime Enter a free prize draw when you buy tickets for Argentina v Australia at Twickenham The 30-year-old said: Its been a very tough decision to make. Ive suffered a number of concussions in the last two seasons and after seeking medical advice Ive come to the conclusion that the risk is outweighing the reward. I have a young family, I have to make decisions that are right by them and although this was a hard decision for me personally its one that I feel is the right one to make. Hargreaves (No 5) in the thick of the action for Saracens against Ulster I leave as a Saracens man to the core. My time in South Africa was fantastic, it was great to play for the Sharks and be capped by the Springboks but this time at Saracens has been my highlight. Ive grown as a rugbby player but more importantly, Ive grown as a human being.ddddddddddddaracens director of rugby Mark McCall added: The welfare of our players is of paramount importance - we are fully supportive of Alistairs decision. Watch NOW TV Watch Sky Sports for just £6.99. No contract. He has played a key role in our recent success with his character, hard-work and leadership coming to the fore over the last four seasons. We wish Alistair, his wife Carmen and their young son the very best for the future.Earlier this year, Saracens appointed centre Brad Barritt as captain he led the side to the Premiership and European Champions Cup titles while Hargreaves was sidelined through injury.Together with former team-mate Chris Wyles, Hargreaves has launched a brewery and the pair are considering opening pubs and creating more beers. You can watch Englands tour of Bangladesh, plus Premier League football and the Japan Grand Prix on Sky Sports. Upgrade now and enjoy three months at half price! Also See: Kruis: Itoje Englands answer Saracens sign Fenby as cover Fixtures and results Rugby Union on Sky ' ' '