Anzhi Makhachkala has completed the signing of
The 27-year-old former Chelsea and Arsenal midfielder has completed a permanent switch to the big-spending Russian outfit alongside
Anzhi chief executive Ayvaz Kaziakhmedo told the club's official website: "The signings of these footballers totally correspond to the strategy of our club achieving top aims.
"We are confident that, together with Lassana and Nikita, the club will fight for the most prestigious titles."
The experienced midfielder joins a host of high-profile names, including
Diarra spent three-and-a-half seasons at the Santiago Bernabeu after joining from Portsmouth in
Real Sociedad continues to hold the edge in the battle for a top-four finish in the Primera Division after a 2-1 victory at Sevilla.