Question: Swiss born Diego Benaglio played goalkeeper under what German coach?
Context: Ruslan Karimovich Nigmatullin (Russian: Русла́н Кари́мович Нигмату́ллин ; ] , Tatar: Руслан Кәрим улы Нигъмәтуллин , "Ruslan Kərim ulı Niğmətullin " ; born 7 October 1974 in Kazan, Tatarstan, Soviet Union) is a retired association footballer of Volga Tatar ethnicity who played goalkeeper and is currently working as a DJ.  He has appeared for the Russian national team 24 times (including 5 Olympic appearances) and was their starting keeper at the 2002 World Cup.  He was voted Russian Player of the Year 2001 and is considered the best Russian goalkeeper of his period. VfL Wolfsburg had their best ever season under new coach Felix Magath.  The double Bundesliga-winning coach from Bayern Munich improved the fortunes of Wolfsburg from a relegation-threatened side to a fifth place-finish.  This was just the start of a sensational ascent to the top of German football, culminating in a shock title win the season afterwards.  New signings Diego Benaglio, Josué, Grafite and Edin Džeko were all successful and played a big part in the resurgence. Walter Junghans (born 26 October 1958 in Hamburg) was a German footballer who played goalkeeper. Jürgen Stars (born 24 June 1948) is a former professional footballer from Germany who played goalkeeper in the Bundesliga and the North American Soccer League. Diego Orlando Benaglio (] ; born 8 September 1983) is a Swiss footballer who plays as a goalkeeper for Ligue 1 club AS Monaco FC. Sverre Fornes (born 25 April 1932) is a retired Norwegian footballer who played goalkeeper for Rosenborg BK between 1948 and 1965.  He also played two matches for Norway B in 1960.  He became Norwegian Football Cup champion twice, in 1960 and 1964. Mirosław Dreszer (born 28 August 1965 in Tychy) is a Polish former football player who played goalkeeper.  He began playing for GKS 71 Tychy; he played in the Polish First Division in the 1984–85 season, and played for Legia Warsaw in the 1985–86 season in two matches.  In 1984, he started as the goalkeeper for the Polish U-18 national team, which finished in third place in the European Championship.  He then moved to GKS Katowice where he played for the next five seasons.  He played a total of 57 matches in the Polish First Division season of 1990–91.  During the final of the European Cup Winners' Cup in the 1986–87 season, he suffered a serious injury against Swiss team FC Sion.  The injury was caused by FC Sion striker Dominique Ciña and Dreszer later required a surgery to recover. Hung Chin-chang () is a Taiwanese football coach and a former player.  He played goalkeeper for the Chinese Taipei national football team.  Currently he coaches National Pei Men Senior High School football team.  Present national team goalkeepers Lu Kun-chi and Chung Kuang-tien are his students. Artur Dyson dos Santos (born 9 January 1911, Lisbon - Deceased), former Portuguese footballer who played goalkeeper for Sporting and the Portugal national team. Dan Popik (born March 23, 1979 in Syosset, New York) is a retired American soccer goalkeeper who is currently coaching at CASL for the U14, U15, and U16 teams, representing all three in Region 3 play.  He has previously served as an assistant with the Carolina RailHawks of the USL First Division and two Division I men's teams, NC State and Furman.  Popik last played goalkeeper for the Columbus Crew of Major League Soccer.
Answer: Felix Magath