* Arsenal hammered Everton 5-1 at the Emirates
* Ramsey scored twice in first half, once more in second
* Defender Koscielny headed home second goal of the night
* New signings Mkhitaryan, Aubameyang linked up to make it 4-0
* Calvert-Lewin pulled one back for visitors in 64th minute
* Arsenal visit Tottenham next, Everton at home to Crystal Palace
LONDON, Feb 3 (Reuters) - Aaron Ramsey scored a hat-trick on Saturday as Arsenal thrashed Everton 5-1 in the Premier League at the Emirates with a display of free-flowing football that the Gunners have sorely lacked away from home this season.
The home side blasted in four in the first half to put the game beyond doubt, leaving their woeful midweek loss at Swansea well behind them.
Ramsey scored twice in the first half, either side of a headed goal from defender Laurent Koscielny.
The Gunners’ new record signing, Gabon striker Pierre-Emerick Aubameyang, renewed his scoring partnership with former Borussia Dortmund team mate Henrikh Mkhitaryan in the 38th minute, chipping his neatly flicked-in pass over the onrushing goalkeeper Jordan Pickford.
Everton’s Theo Walcott was substituted off on the hour mark to a standing ovation from his former club, and was replaced by forward Dominic Calvert-Lewin who moments later headed in from close range.
The win leaves Arsenal unchanged in sixth place in the table, three points adrift of north London rivals Tottenham Hotspur, who visit Liverpool on Sunday. The Gunners travel to Spurs in a week’s time.
Everton’s loss pushes them down one spot in the table to 10th. (Reporting by Hugh Lawson, editing by Pritha Sarkar)