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Chelsea's new interim manager Guus Hiddink (R) speaks to members of the Chelsea staff after winning the English Premier League football match between Chelsea and Sunderland at Stamford Bridge in London on December 19, 2015. AFP PHOTO / IAN KINGTON RESTRICTED TO EDITORIAL USE. NO USE WITH UNAUTHORIZED AUDIO, VIDEO, DATA, FIXTURE LISTS, CLUB/LEAGUE LOGOS OR 'LIVE' SERVICES. ONLINE IN-MATCH USE LIMITED TO 75 IMAGES, NO VIDEO EMULATION. NO USE IN BETTING, GAMES OR SINGLE CLUB/LEAGUE/PLAYER PUBLICATIONS. / AFP / IAN KINGTON (Photo credit should read IAN KINGTON/AFP/Getty Images)

Chelsea's new interim manager Guus Hiddink (R) speaks to members of the Chelsea staff after winning the English Premier League football match between Chelsea and Sunderland at Stamford Bridge in London on December 19, 2015. 
AFP PHOTO / IAN KINGTON
RESTRICTED TO EDITORIAL USE. NO USE WITH UNAUTHORIZED AUDIO, VIDEO, DATA, FIXTURE LISTS, CLUB/LEAGUE LOGOS OR 'LIVE' SERVICES. ONLINE IN-MATCH USE LIMITED TO 75 IMAGES, NO VIDEO EMULATION. NO USE IN BETTING, GAMES OR SINGLE CLUB/LEAGUE/PLAYER PUBLICATIONS. / AFP / IAN KINGTON        (Photo credit should read IAN KINGTON/AFP/Getty Images)