is relieved he no longer has to deal with the "nightmare" threat of Sergio Aguero in games.
Right-back Walker now has the task of creating goals for the prolific Argentinian having left Tottenham for Manchester City over the summer.
Aguero, who is just one short of equalling City's all-time goalscoring record of 177, has tormented Spurs since arriving in England in 2011, netting nine times against the Londoners.
Walker said: "To play against he is a nightmare. Facing him numerous seasons, he always seemed to score against us. It was frustrating.
"Having him on the same team now is a big bonus, he is a quality player.