"I told Messi that the strike was not intentional and he told me he knew it," Smoling said.
"I talked to him after the game and did not know when he did all that, we talked after the game and then we shook hands."
"It's great to fight in the field and then be completely respected after the game, because you are finally trying to do the best and enjoy the game," said Smoling.
Smoling, who plays at Manchester United's defense center, has had a strong fight with Messi during the fight against a ball as a whole, causing the last blood to appear from the nose and from the eyes after his hand reached to the Argentine fight in the 1-0 win over Barcelona.
The return will be made on Tuesday at the Camp Nou.