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Alexis Sanchez's bad start to the season continued on Tuesday evening when Manchester United were held to a 0-0 draw by Valencia at Old Trafford in the Champions League, and the Chilean failed to impress in what was another disappointing result for José Mourinho's men.

Sanchez, who joined United in January after deciding he wanted to lave Arsenal, has yet to make a real impact with his last goal coming in the FA Cup semi-final against Tottenham Hotspur back in April.

Comparing that to his destructive goalscoring form with the Gunners, United fans are worried as to why the club and manager aren't getting the best out of him. Sanchez started on the left-wing as part of a front three next to Romelu Lukaku and Marcus Rashford, with the Red Devils desperate for a good result against the Spanish side.

However, the draw means that they have now gone four games without a win as the pressure continues to mount on Mourinho and the club.

Here are some of the Twitter reactions by the fans to Sanchez's performance: