On-loan striker Odion Ighalo has completed a permanent move to Watford, signing until 2017.
The 25-year-old, who has scored three times in four Championship starts for the Hornets so far this season, had been on loan from Serie A side Udinese.
Ighalo has previously spent time on loan with Watford owner Giampaolo Pozzo's Spanish side Granada, where he scored 35 goals in in 127 appearances.
His three goals for Watford this season have come in his last three games, against Brentford, Sheffield Wednesday and Nottingham Forest.