Laurent Koscielny says he is enjoying life at Arsenal, but that the home defeat to West Brom still haunts him.

Arsenal have started the season well, but a shock home defeat to the newly promoted side was a definite low point, and summer signing Koscielny believes the Gunners can't lose at the Emirates again.

The French centre-back believes there is potential for this side to win something this season, but a strong home record is essential.

After scrapping for a late goal against West Ham last week, Arsène Wenger's side face another potential tricky home tie as they welcome Newcastle United to the Emirates.

Koscielny hopes it will be the first of many strong home performances, saying: "It has been a busy and satisfactory start for me. I am happy with my first few months at Arsenal.

"The toughest match for me so far was definitely West Brom. I had been playing lots of games prior to that one and was at the limit of my physical possibilities.

"When you are not at your physical best, it is hard to mentally give the effort such a game requires.

"To lose at against them at the Emirates Stadium left a bitter taste and we have to be unbreakable at home."