Luis Suarez replaced the Chilean at Camp Nou during the summer, and Oxlade-Chamberlain feels that the Gunners now have their own equivalent to the dogged Uruguayan.
"He's a world-class player - everyone saw that at the World Cup," he told the club's official site. "He's proved that and he's played for Barcelona where we've all seen what he's done.
"He's an unbelievable player and part of his game is his character and his hard work - that's where he's got both his goals from today.
"He reminds me of Luis Suarez when he chases everything down and he makes nothing into something. He's done that for us twice today and he's scored goals at important times for us."
Arsenal sit fifth in the Premier League table, eight points adrift of leaders Chelsea.