UPDATE 2-Soccer-Fernandes investigated after nightclub incident

(Updates after appearance in court)

MADRID, Jan 4 (Reuters) - Valencia midfielder Manuel Fernandes is under investigation by a local court after being involved in an incident at a nightclub in the early hours of Friday morning.

Fernandes, whose agent has said he is poised to join Premier League side Everton, appeared in front of the magistrate after being taken into custody when police were called to deal with a fracas at a nightclub in the city. He was later released.

The magistrate decided against carrying out a fast-trial and ordered further investigation into allegations by police officers that they had been injured in the incident.

Fernandes's team mate and fellow Portugal international Miguel told reporters after training on Friday morning that the two players had been involved in the incident after being falsely accused of stealing a watch.

Miguel said 21-year-old Fernandes had been taken to the police station for questioning, but that he had not joined him because he refused to leave the nightclub unless accompanied by a lawyer.

Valencia coach Ronald Koeman said he had decided to leave Fernandes out of the squad for Sunday's match at home to city rivals Levante.

"It is the first measure that I've had to take and now I will talk to the club about the matter," Koeman told a news conference on Friday.

"There are certain rules that have to be followed at the club and if they aren't then it is a problem for the player, but I don't want to say anymore until I talk it over with the club."