Real Valladolid have appointed former Spain boss Javier Clemente as their new coach until the end of the season.
The club confirmed that the 60-year-old would be replacing Onesimo, who was sacked on Monday after Valladolid slipped seven points adrift of safety with eight games remaining.
“Javier Clemente is the new coach of Real Valladolid,” read a statement on the club’s official website.
“The Basque coach came in Tuesday morning to Valladolid and after meeting with (club president) Carlos Suarez he sealed his commitment to the club for the remainder of the season.”
The veteran coach has been out of management since being sacked by Real Murcia in December 2008.
Clemente made his name at Athletic Bilbao in the early 1980s, leading them to two La Liga titles and a Copa del Rey triumph.
He took the Spain job in 1992, leading the national team in two World Cups and at Euro 96 before being fired in 1998.
Onesimo was sacked after defeats by Villarreal (2-0) and Xerez (3-0) in their last two games.