Look: 5 main talking points from weekend's English Premier League matches
Assists for Sancho, Diaz shines, Everton struggle, Burnley given hope, Chelsea in late win
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SANCHO COMING GOOD AT RIGHT TIME: Jadon Sancho struggled to hold down a first-team spot after joining Manchester United, but after a stellar performance in his side's 4-2 win at Leeds United on Sunday, the England forward is starting to show his worth.
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Sancho registered his first Premier League assists since joining United in the close season, setting up Bruno Fernandes for his side's second at Elland Road, before laying on the perfect pass to Fred for the crucial third. The 21-year-old England international has been involved in four goals in his last five games for United - two goals and two assists - twice as many as in his first 23 appearances for the club.
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DIAZ ADDS TO LIVERPOOL'S ATTACKING ARSENAL: Liverpool manager Juergen Klopp was hardly short of offensive options before the club signed winger Luis Diaz from Porto in January, but the Colombian could be set for a key role in the Premier League title battle.
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Diaz opened his Liverpool account with a deftly-taken goal to finish off Norwich City on Saturday and appears to have immediately struck a chord with the Anfield fans. With an ability to carry the ball at pace on the left, Diaz also knows how to finish and offers the prodigious workrate that Klopp demands from front to back. With Roberto Firmino and Diogo Jota sidelined by injuries, Diaz's arrival looks timely for Liverpool.
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EVERTON NEED TO FIX AWAY FORM FAST: New manager Frank Lampard will be mystified by Everton's Jekyll & Hyde performances that have seen them play with swagger and verve at home but be timid and error-prone on the road. He will acknowledge that Everton are in a relegation battle after Saturday's dismal 2-0 loss to Southampton, where they were second best in every department, but will hope to find the right formula to improve their away performances.
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Their form at Goodison Park may be enough to keep them up, but with Manchester City the visitors on Saturday, Lampard faces a busy week on the training ground. The expected return from injury of box-to-box midfielder Abdoulaye Doucoure should provide a boost.
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AFTER LONG BREAK, SAME PROBLEMS FOR CHELSEA: Chelsea had hoped a month-long break from the Premier League, which included their Club World Cup triumph in Abu Dhabi, would draw a line under their winter slump. But the Blues still looked bereft of ideas even as they came away from Crystal Palace on Saturday with a 1-0 win. The creativity of injured Mason Mount and Callum Hudson-Odoi was missed.
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But with Romelu Lukaku, Kai Havertz (above) and Christian Pulisic again under-performing, coach Thomas Tuchel may need to shake things up before the visit of Lille in the Champions League and the League Cup final against Liverpool.
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MAN MOUNTAIN WEGHORST COULD SAVE BURNLEY: Burnley's new signing Wout Weghorst looks like a man mountain at 6-foot-6-inch and he was presumably bought to offer Sean Dyche's side a battering ram up front. But despite Burnley's reputation for non-nonsense direct football, Dutch striker Weghorst has provided much more than just a physical presence with his surprisingly deft touches.
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Weghorst not only tormented Brighton's defence with his hold-up play but their midfield as well when he dropped deep to create chances, coming away with a goal and assist in a priceless win that lifted Burnley off the bottom.
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