Rio Ferdinand has insisted that one Manchester United star is in a “nice vein of form” and “building a bit of confidence” after the 3-3 draw against Porto. Manchester United travelled to the Estadio do Dragao in Portugal on Thursday evening for the second Europa League match of the season. Erik ten Hag’s men impressed in the first 20 minutes against Porto and Marcus Rashford netted United’s opener in the seventh minute of the contest. Marcus Rashford then set up Rasmus Hojlund for United’s second in the 20th minute before the Red Devils suffered a defensive collapse in the first half. Pepe pul…