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Manchester United take on Swansea on Sunday, with both teams looking to build on an unbeaten record. Manchester United have two wins and a draw, and Swansea two draws and a win.
Swansea have looked very impressive in attack, with Jefferson Montero especially incisive on the left wing, which should at least bring another Matteo Darmian yellow card. Darmian and Montero should be each other's toughest challenge of the season so far. Another Swansea forward, Bafetimbi Gomis, is in excellent form, and should provide an excellent examination of Daley Blind at centre back - Chris Smalling will need to be on his game to focus his energy on negating him.
But that's not the only threat. Andre Ayew joined Swansea this summer and has displayed his goalscoring, technical ability and speed already, notably with an excellent piece of footwork to score at Stamford Bridge. Away from home, United might need to sit back and absorb pressure, and use both their central midfield of Bastian Schweinsteiger and Morgan Schneiderlin to provide sufficient cover.
That could be to United's advantage, who always play better when the opponents give up room for the side to play in. Memphis Depay and Luke Shaw are the obvious attacking outlet, on the left wing, and if Ander Herrera starts after finishing strongly against Club Brugge, and plays as a number 10 (Adnan Januzaj is out injured), then there's an extra threat to launch attacks.
On the right wing, expect Juan Mata to keep his place, with Wayne Rooney the best option in attack after Javier Hernandez wasted his audition in midweek.
Sergio Romero should continue in goal, and to his credit, has not made any costly howlers. Yet. In his pre-match press conference, Louis van Gaal was clear that Romero has not yet been called upon to show the depths of his skill:
"I don't think so because until now we don't allow a lot of shots or moments in our 16-metre area.
"So I think he did very good saves but until now I think only maybe the save in Brugge at 1-0 was very important and he did also a save against Tottenham. So he could not show what he can show. I think but that is only a compliment to the team."