Valencia boss Gary Neville accepts he must prove his managerial credentials to those who believe the Spanish club have made a "risky" appointment.
Neville, 40, has been appointed until the end of the season, despite having no previous managerial experience.
Valencia owner Peter Lim has a stake in Salford City, co-owned by Neville.
"I understand why these questions are being asked and I have to provide the answers on the football pitch in the coming months," said Neville.
The former Manchester United and England defender officially takes over on Sunday, following Valencia's league game against Barcelona on Saturday.
His first match in charge will be Wednesday's Champions League home match against Lyon.
"I think we've all seen inexperienced coaches succeed and experienced coaches fail. There is no magic formula." added Neville, speaking in his first news conference as head coach.
"I accept I've got to prove myself and turn the doubters who say it is a risky appointment."
Neville replaces Nuno Espirito Santo, who resigned after Sunday's 1-0 defeat at Sevilla, a result that left Los Che ninth in the Spanish league.
The club finished fourth last season, but have won only five of their 13 league matches this term.
espero que Valencia vuelva a ser un equipo fuerte del año 2002 -3 con hector cuper y raffa benitez . doblete de epoca. amunt valencia