Casemiro’s reaction during one key moment in Manchester United’s 1-1 Premier League draw against Chelsea at Old Trafford on Sunday spoke volumes. The Red Devils played their first Premier League match without former Manchester United manager Erik ten Hag, who was sacked from the Red Devils last week. Ruud van Nistelrooy, who was assistant manager under Erik ten Hag, has taken charge of United as interim manager until the arrival of Ruben Amorim. Bruno Fernandes opened the scoring for United in the second half and broke the deadlock for the Red Devils from the spot-kick. However, Chelsea rallie…