According to local Nice paper, Nice Matin, the French club have agreed a fee of around four millions euros with Arsenal for Colombian international goalkeeper David Ospina.
Ospina, 25, impressed during this summer's World Cup in Brazil and has been linked with a move to London ever since Lukas Fabianski opted to leave the Gunners for a free transfer to Swansea.
Arsene Wenger insisted on Saturday that a goalkeeper was a priority signing, in order to provide No. 1 Wojciech Szczesny with competition.
The club have already bought Alexis Sanchez (35 million pounds) and Mathieu Debuchy (12 million pounds) this summer, with reports linking them to Sporting Lisbon's William Carvalho and Real Madrid midfielder Sami Khedira.