Arsenal forward Alexis Sanchez has revealed that fear of picking up another injury has damaged his form this season.

The Chile international limped off at Norwich with a hamstring injury back in November that kept him out of the Arsenal frontline for two months.

Sanchez scored in Saturday's 4-0 victory over Watford for just his third goal since returning to action.

Arsenal forward Alexis Sanchez (right) celebrates scoring in his side's 4-0 victory over Watford

The Chile international limps off with a hamstring injury in the draw at Norwich back in November

Sanchez and his Arsenal team-mates have had their fair share of frustration this season

Sanchez rues a missed chance against Watford at the Emirates Stadium on Saturday

The 27-year-old was the talisman in Arsenal's side last season but has so far struck 12 goals in all competitions for Arsene Wenger's side this campaign and has struggled to make a significant impact.

'Before my injury I was 100 per cent fit. I was feeling well. After the injury I wanted to get back but it was hard, Sanchez told Premier League World.

'I had a setback and when I played a match, I was scared I would get injured again because the thing I like most in the world is playing football and when I can't play, I feel sad.'

ALEXIS SANCHEZ SEASON STATS Appearances (all comps): 34 Goals (in all comps): 12 Premier League apps: 23 Premier League goals: 8 Shot accuracy (PL): 52% Premier League assists: 4 Advertisement

Sanchez is adamant he is getting back towards his best form and hopes to ignite a strong end of the season for Arsenal, who still harbour faint Premier League title hopes having crashed out of the Champions League and relinquished their FA Cup crown.

He also admits that the recent defeats for the Gunners have been hard to take.

'I think I have adapted well to the club but I am never satisfied with what I do. I want to win the Premier League, the Champions League. I always want to win everything,' said Sanchez.

'Football is my passion, my life and I always want to win.

'If I lose, I always go home sad, I can't sleep and that upsets me. When I win, my team-mates are happy and enjoy their families the next day. Football is my life.

Sanchez will hope to be on the scoresheet again when Wenger's side face a stern test at West Ham on Saturday afternoon.

The 27-year-old scored a sublime goal in the victory over Manchester United back in October

The rapid Chilean has only managed to score three goals for the Gunners since returning from injury