Gary Neville spotted that Casemiro was furious with one Manchester United teammate after just avoiding a red card during the first-half of their clash with Luton Town on Sunday. Casemiro was certainly fortunate to not be sent off towards the end of the first-half at Kenilworth Road. The 31-year-old was already on a yellow card when he appeared to take Ross Barkley out in the middle of the park. The Brazilian had actually received the ball from Alejandro Garnacho. However, Casemiro was unable to get the ball under control. And when Barkley stole possession, the midfielder dived in and brought t…