A biography of Louis van Gaal has claimed that the Manchester United manager is "disgraceful" towards his wife when he has been consuming alcohol.
Author Hugo Borst's book O, Louis: In Search Of Louis van Gaal is being serialised in The Times.
An extract from the biography said: "The way he treats [his wife] Truus in company is ungentlemanly and sometimes downright disgraceful.
"In the company of friends and acquaintances, Louis has made comments that in nine out of 10 marriages would have been grounds for divorce. People who have lunched or dined with Louis say alcohol does not have a favourable effect on him."
Meanwhile, former AZ Alkmaar goalkeeper Khalid Sinouh revealed to the author that the manager once shouted so hard that his dentures flew out in the dressing room.
