Schumacher had told many that he did not want to race that weekend in Italy and now reveals how close he came to quitting the sport.
In an interview for Retequattro, to be broadcast this evening (Tuesday), the Ferrari ace revealed: "I certainly thought about it," he says, according to Gazzetta dello Sport. "It was a key period in my life with the attack on the Twin Towers and the dramatic injury to Alex.
"It was difficult to get back in the car and drive again as if nothing had happened. I didn't feel like it and I would have rather been anywhere else than driving. I felt like it was a bad sign to be driving at Monza after what had happened.
"I was very resistant but then I decided to get out on the track although my heart wasn't in it. I was there in the car but in reality I was somewhere else," adds the German.
Schumacher had attempted to stop drivers from overtaking at the first corners last season, desperate to prevent any injury or death (seen there in 2000).