Whether or not the improved power-weight ratio and a closer cropped hairstyle makes the world's fastest human quicker than ever when he races in Rome's Olympic Stadium on Thursday evening will not alter his plan to break his training and competition programme to be at Wembley.
'That's not in question,' said the United fan.
Show of support: Fervent fan Bolt will be at Wembley to watch his beloved United
For his team Bolt predicts a 2-1 victory but when the questions turn to his own goals in his year's first 100 metres or in his second in Ostrava next Tuesday after his Wembley diversion he is less specific.
What he did offer was a menacing promise for rivals whose hopes were enhanced when he was beaten by Tyson Gay in his last race 10 months.
'I'm going out there to prove to the world that I'm still the best,' said the only man to have run 100 metres in 9.58sec
Bolt suffered back problems last summer after a post-Beijing winter when he admits he was less than serious about training. He ended his season early after his defeat but says the back is no longer bothering him. Nor it seems is Gay.
He praised the American - 'he doesn't drink, he doesn't party, he is the complete athlete' - but dismissed the notion that defeat to him has done anything to his own confidence.
Back on track: Bolt trains in Rome following an injury-hit season
'Absolutely nothing.' he said. 'Last season wasn't my best season. It was kind of a season of down time for me. This season is back to business. I'm really focused and ready now.'
He is more than four kilograms lighter but broader in the shoulders after working harder in the gym. An indication of how much extra speed that may bring was the recent 9.80sec run of Yohan Blake.
'Definitely I think I think I am faster than Yohan. We train together and I beat him up a few times,' said Bolt.
That would threaten Gay's record for the 51-year-old stadium of 9.77sec and with former world record holder Asafa Powell present, it may be necessary just to win.
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