Nus comes to Oklahoma City from Madrid, Spain, the home of Rayo Vallecano, which is the majority owner of Rayo OKC. Nus was serving as the assistant technical director of Rayo Vallecano.

“Our ownership group introduced a new vision for the club this week, and it was presented to Alen and his staff,” Raúl Martín Presa, chairman of Rayo Vallecano said in a statement. “In the end, Alen decided that it was best to move in a different direction, and we respect his decision and wish him well moving forward.

"On the other hand, we're thrilled to welcome a coach of Gerard's caliber to the club, and we're looking forward to seeing the team flourish under his guidance and expertise.”

The relationship between the Spanish club and OKC has been strained for some time. Rayo Vallecano was demoted from the top division in La Liga earlier this year after finishing its season in the bottom three.