He's probably talking about Di Maria saying that Messi is the best player in the world.
Not exactly. He just said that some players take their chances, while other needs 10 chances to get a goal. After one of the matches Messi scored in, there is no need to guess who that "other" guy was. Not regarding the comments about Messi, i think its a bit rude to add those lines about Ronaldo, if he is supposed to be such a good friend.