Summary:
Arsenal have signed former Colombia captain William Carvalho from Nice for an undisclosed fee.

Full article:
Arsenal have agreed a £3.2million fee with Nice for goalkeeper David Ospina. The 25-year-old starred for Colombia during the World Cup and will provide competition for Wojciech Szczesny. Ospina has turned down an offer from Valencia. Ospina was one of several goalkeepers to impress at the World Cup, helping Colombia to a quarter-final appearance against hosts Brazil. VIDEO Scroll down to watch Arsenal target Carvalho take out two players with one tackle . In demand: The Columbian keeper impressed in the World Cup . David Ospina will be serious competition to current number one  Wojciech Szczesny . VIDEO Wenger with unfinished transfer business . Arsenal, meanwhile, have made a fresh enquiry for Sporting Lisbon's £35m-rated William Carvalho as they continue their bid to sign a defensive midfielder. It is believed that his club are holding out for an offer closer to the €45m release clause he has in his current contract. Target: Arsenal have been watching Sporting Lisbon's William Carvalho . Arsenal have already signed Chilean star Alexis Sanchez from Barcelona .