Queiroz began his work in Manchester United at the start of the 2002-03 season, working alongside Sir Alex Ferguson, who had gone without an assistant since the departure of Steve McClaren in the middle of 2001.
Goodwill messages are continuing to pour in for Sir Alex Ferguson, one of world football's most iconic managerial figures who is recovering in hospital after undergoing emergency surgery for a brain haemorrhage.
However, doctors expressed cautious optimism and recognize that the healing process 76-year-old Ferguson will be long.
Giggs was just one of many youngsters that Ferguson nurtured from the United academy to stardom on the worldwide stage.
Although no official updates have been provided since, the Daily Mail have provided uplifting news that he is now out of a coma and is "sitting up talking and asking about his results" after citing friends of Ferguson.
"This Saturday, all of us were overwhelmed by the news about Sir Alex Ferguson's health condition", Mata said.
"He is the one who brought me to the club and gave me that opportunity to play for one of the biggest clubs in the world", Jones added.
Manager Sir Alex Ferguson and Patrice Evra of Manchester United celebrate with the Premier League trophy after the Barclays Premier League match between Manchester United and Swansea City at Old Trafford on May 12, 2013 in Manchester, England.
"His record speaks for itself, and what he achieved at Manchester United".
Although the Spaniard was signed by Ferguson's successor David Moyes, midfielder Mata spoke about the Scot's lasting impact at United.
"I know the operation has been a success - but he is a fighter and that is what makes me think that he will be able to make a recovery", said Giggs.
Chelsea boss Antonie Conte said: "I have had the possibility to know him and his wife and to understand that this is a special person".
Carrick told MUTV: "I got a text on Saturday evening and I couldn't quite believe it. He told me he's doing a lot of exercise, he looked very happy".
"Everyone at the club is wishing him all the best and his family as well".