Ghana coach Otto Addo has been impressed with Son Heung-min ever since he coached the South Korean forward at the youth level.

The two will be reunited on Monday when Ghana meets South Korea in a World Cup Group H match at Qatar’s Education City Stadium.

Atto was an working for Germany’s Hamburg when he first encountered Son, who he recommended for the club’s first team.

“He’s very, very disciplined. So he became so good because he worked hard for it. This is what I hoped for, and I expected it,” Addo said Sunday before the match.

Addo added with a smile: “I always wish him all the best, except tomorrow.”

Son and the South Koreans challenged Uruguay in their tough Group H opener, coming away with a 0-0 draw.

“In terms of offense, we had a very good performance,” South Korea coach Paulo Bento said through a translator. “We are a brave team, we are not afraid of our rivals.”

Son personified that bravery, wearing a mask to protect a broken left eye socket and cheered on by fans wearing Batman masks. He was injured playing for Tottenham on Nov. 2 in a Champions League match against Marseille that limited his training in the runup to the World Cup.

Addo, who played for Ghana, is one of five African coaches leading the five African teams at the World Cup in Qatar. He joins Cameroon’s Rigobert Song, Senegal’s Aliou Cisse, Morocco’s Walid Regragui and Tunisia’s head coach Jalel Kadri.