Manchester United star Alejandro Garnacho clashed with a fan prior to their Europa League match against PAOK on Thursday night. The winger was signing autographs for fans as he got off the team boss outside Old Trafford. One supporter, however, was barking criticisms at the 20-year-old while filming on his phone, later posting the footage on social media. “Garnacho you’ve got to pass better today yeah, please? Just pass better today,” he said. Garnacho appeared to ignore the fan initially as he continued to sign autographs for other supporters. The fan continued: “Score a goal, and work on you…