Arsenal has put pressure on their fellow Premier League title challengers as they secured a 4-0 victory against Swansea City on Saturday.

Paul Clement, who took over as Swans head coach on January 3, said Arsenal were appropriate opponents for his first league game in charge given the scouting report he had compiled on them while at Bayern Munich, but all his careful planning was undone by ill-fortune and miserable defending.

Swansea had matched the Gunners' intensity early on but a loss of concentration allowed Giroud to turn in from close range after the returning Mesut Ozil's header was not cleared.

Sanchez capitalized on some more poor defending to add a fourth for Arsenal that moves them above Liverpool - who face Manchester United on Sunday - and into third in the table, five points behind leaders Chelsea.

Swansea were comfortable in dealing with the Gunners' threat, but they switched off for the first time eight minutes before the break to allow the visitors to take the lead.

Sanchez collected the ball from an Aaron Ramsey cross and picked out Ozil unmarked near the penalty spot, and when his header deflected into Giroud's feet, the France striker fired high into Fabianski's net from point-blank range.

Arsenal turned up the pressure from the off in the second half and found a crucial second goal with 54 minutes played - albeit in extremely fortunate circumstances.

Swansea heads had dropped and Sanchez made the most of some more slack defending to score Arsenal's fourth, the Chile star placing the ball into the top-right corner of Fabianski's net after it fell kindly to him following Wayne Routledge's challenge on Ramsey.