Carles Gil has joined Premier League strugglers Aston Villa from La Liga side Valencia.
The 22-year-old midfielder becomes Paul Lambert's first signing of the transfer window, penning a three-and-a-half year deal.
Aston Villa's move for Carles Gil has hit a last-minute hitch over agents' fees.
The Valencia midfielder's representatives have increased their demands in the final stages of the deal.
Press Association Sport understands, however, Villa are still confident of signing the 22-year-old.
Villa are working through the late snag with Gil expected to sign a five-year deal after flying into Birmingham on Monday.
They had planned a press conference to unveil the Spain Under-21 international at their Bodymoor Heath training ground on Tuesday afternoon but have now been forced to postpone it.
Eleven people were arrested and two charged by as police looked to pre-empt any trouble from "hooligan elements" surrounding a Premier League Midlands derby game.
Leicestershire Police said the arrests were made following preventative use of stop and search powers in an intelligence-led operation around today's tie between Leicester City and Aston Villa.
A 16-year-old youth was charged with possession of a firework under the age of 18, and a 24-year-old man was charged with possessing an offensive weapon.
Both have been served with football banning notice applications.
The force said the decision to use its powers was made "in response to intelligence which suggested serious disorder was being planned between the hooligan elements of both clubs".
In all, officers stopped and searched 87 people and arrested two.
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Former assistant manager Roy Keane did not have a training ground bust-up with players, according to Aston Villa.
Keane left his role at the Birmingham club on Friday, saying he could not combine his duties there with a similar job with the Republic of Ireland national team.
Newspaper reports claimed the former Manchester United midfielder had a confrontation with senior members of the Villa squad the day prior to resigning.
Roy Keane has quit his role as Aston Villa's assistant manager with immediate effect, the club have announced.
The 43-year-old had been splitting his time between Villa and his job as Martin O'Neill's number two with the Republic of Ireland.
But Keane has stepped down from the Barclays Premier League club ahead of their trip to Burnley on Saturday.
Keane said in a statement: "Ultimately, my roles with Villa and Ireland and combining my commitment to these have become too much.
"It isn't fair to either Villa or Ireland, so I've made this decision.
"I'd like to thank Paul for giving me a great opportunity to come to a brilliant football club, I've really enjoyed my experiences at Villa and I wish the management team, the players, the supporters and the club nothing but the best going forward."
Aston Villa manager Paul Lambert is facing pressure to resign from supporters following Monday night's 2-0 defeat at QPR.
The result consigned Villa to an unwanted piece of history, as they became only the ninth club in Premier League history to lose five consecutive matches without scoring a goal.
Lambert's side have now shipped 13 goals without reply in five matches, and supporters have been venting their displeasure on Birmingham Mail's Facebook page.
Richard Hunt wrote "Lambert out, enough is enough," while Mark Pearson suggests Lambert has "had his time. He wasn't good enough."
Villa host Spurs on Sunday before travelling to high-flying West Ham the following weekend, where Liverpool and Man City have already fallen to defeats this season.
Aston Villa owner Randy Lerner has said in a statement that he intends to sell the Premier League club.
"Now is the time for me to look for new ownership and thus new leadership," Lerner said, adding that Bank of America Merrill Lynch has been hired to advise on the sale.
The American owner was widely expected to make a significant statement after confirming last month that he would clarify his own future at the club at the season's end.
Villa concluded the 2013-14 campaign with a 3-0 defeat at Tottenham yesterday to finish in 15th place in the league, five points above the relegation zone.
Thomas Hitzlsperger's former club Aston Villa has praised him after the ex-footballer announced he was gay:
Everyone who knows Thomas from his time here at Villa has great respect for him, not only as the fine player he was but also as a man. (1/3)
His statement today is a straightforward statement and, along with our support as a club, we hope that everyone involved in the game...(2/3)
...extend to him their support as well. (3/3)
Prince William's ambition to persuade his son George to follow Aston Villa could see the future King join a powerful set of supporters of the Midlands team.