The 35-year-old Olympic silver medallist became unified world champion in 2011 and has to his credit 34 wins from 40 fights.
Kell Brook retires from boxing after victory over Amir Khan in February brought him peace.
Khan, who won silver as a lightweight at the Athens Olympics in 2004 and is a former unified light-welterweight champion, says he is hoping to spend more time with his family.
Communications masts in two English cities have been set alight as false news of a link between 5G infrastructure and the coronavirus takes hold.
Imran Khan's personal history gives him a leg up in trying to start a dialogue on Kashmir and moving towards ending the 72-year stalemate with India.
Golovkin will face his toughest test yet. The Kazakh is unbeaten in his 37 professional fights, but Alvarez has beaten some of the biggest names in boxing, including Amir Khan, Miguel Cotto and Shane Mosley.
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