Michael Schumacher's manager Willi Weber has said that he begged the seven-time world champion not to return to the sport in 2010.
From his debut in 1991 to his last year with Ferrari in 2006, Schumacher's career at the pinnacle of motorsport had yielded 91 wins.
The German racer had been enjoying a leisurely three-year retirement when he was tempted to return to F1 by Mercedes at the end of 2009. However, long-time friend and manager Willi Weber saw the return as the wrong move.
"I summoned him and said ‘Please don’t do it. You can only lose’," Weber said to German newspaper Abendzeitung.
"He was a seven-time world champion with nothing to prove. But he really wanted to drive. I thought it’s fine that he drives, but it will be without me."
Schumacher went against Weber's advice, meaning that the two men parted ways. They remained in close contact despite the disagreement.
"We still had a contract until 2014, but I just didn’t want to go around the world anymore," added the German, who has often lamented the extreme privacy surrounding his former protégé's health, as imposed by the Schumacher family.
"I am a person who sees that everything in life has its time. And what Michael and I did in almost 20 years, that was our F1 time.
"You cannot repeat that or bring the past back to life. We separated as friends and then spoke hundreds of times on the phone or together for coffee or dinner."
Michael Schumacher's 50th birthday, celebrated on January 3rd, will be marked by a special exhibition hosted by the Ferrari Museum in Maranello.