Task: Question Generation
Input (English): Context_1 : Ivan Dodig and Lovro Zovko were the defending champions but Dodig not to participate.<br> Context_2 : This was the first edition of the tournament, Ivan Dodig won the title beating Benoît Paire in the final 7–5, 6–1. Context_3 : Frederico Gil and Ivan Dodig were the defending champions, but Dodig decided not to participate. Context_4 : Nicolas Mahut and Vasek Pospisil were the defending champions, but Pospisil chose not to participate this year. Mahut played alongside Pierre-Hugues Herbert, but lost in the semifinals to Ivan Dodig and Marcel Granollers. Context_5 : Ivan Dodig and Marcelo Melo were the defending champions, but Dodig chose not to participate this year. Melo played alongside Vasek Pospisil, but lost to John Peers and Henri Kontinen in the semifinals. Context_6 : Ivan Dodig and Júlio Silva were the defending champions, however only Dodig chose to play this year. He competed with Lovro Zovko. They lost to Brian Dabul and Leonardo Mayer in the first round. Context_7 : Ivan Dodig and Marcelo Melo were the defending champions, but chose not to participate together. Melo played alongside Łukasz Kubot, but lost in the second round to Fabrice Martin and Édouard Roger-Vasselin. Dodig teamed up with Rohan Bopanna, but lost in the final to Pierre-Hugues Herbert and Nicolas Mahut, 4–6, 6–3, [6–10]. Context_8 : Ivan Dodig and Marcelo Melo were the defending champions, but chose not to participate together. Dodig teamed up with Rohan Bopanna, but lost in the quarterfinals to Melo who partnered Łukasz Kubot. Kubot and Melo lost in the semifinals to Jamie Murray and Bruno Soares. Context_9 : Ivan Dodig (born 2 January 1985) is a Croatian tennis player. His career-high ATP rankings are world No. 29 in singles and world No. 4 in doubles. Dodig is a Grand Slam champion after winning the 2015 French Open men's doubles title with Marcelo Melo. Context_10 : Donald James "Don" Johnson (born September 9, 1968) is a former professional tennis player from the United States who reached the World No. 1 doubles ranking in 2002. Although born in Bethlehem, Pennsylvania, he was raised and learned the sport of tennis in the Pittsburgh suburb of Mt. Lebanon, Pennsylvania. Johnson attended Fairview High School in Erie, Pennsylvania, and won the PIAA State Singles Championship in 1984. During his career, he won the Wimbledon men's doubles title in 2001 (partnering Jared Palmer), and the Wimbledon mixed doubles title in 2000 (partnering Kimberly Po). He also won the doubles title at the Tennis Masters Cup in 2000 (partnering Piet Norval). He won a total of 23 top-level doubles titles. fact_1 : Ivan Dodig (born 2 January 1985) is a Croatian tennis player. fact_2 :  His career-high ATP rankings are world No. 29 in singles and world No. 4 in doubles. fact_3 : Donald James "Don" Johnson (born September 9, 1968) is a former professional tennis player from the United States who reached the World No. 1 doubles ranking in 2002. Answer: Donald James "Don" Johnson
Output (English): Who achieved a higher doubles ranking Ivan Dodig or Donald Johnson?