 Complete the following phrase:  During the 2014 World Cup qualification campaign, Mertesacker contributed two goals and also re-established himself as first-choice centre back following a long-term injury to Badstuber in the middle of the 201112 season, often partnering either Hummels or Jerome Boateng. He was called up for the final World Cup squad and played in all but one of the matches during Germanys successful run to the 