No, he could just slug Discord in the face. Tirek made Discord look like an idiot with no effort what so ever, even paralyzing him before draining him. Superman also has super intelligence, which he really doesn't need, Discord is too cocky to actually use his intelligence effectively.
But again, he doesn't need to, he can simply punch Discord or drag him into space until he calls "uncle", all whilst dodging any of his attempts to do anything. I stand by my general belief that the most MLP can take on is a mountain range, judging by the destruction caused by Tirek and Twilight's battle. But Discord is much weaker than both of them. He's a dimestore version of Q, who is a dimestore version of Mr. Mxyzptlk