But the 30-year-old sprinter looks determined to let his feet do the talking and started the day in the heats by overcoming a false start to finish in 6.53s - just 0.02s off his own world's quickest indoor time this year.
He had warned everybody they should expect something special and although his semi-final involved yet another false start, he stormed to an easy victory, clocking just 0.03s over Maurice Greene's world record of 6.39s.
Chambers added: "I'm very pleased. It's something that we planned for but not for it to come so soon in the championships.
"I had hoped for it in the final but I've got to remain cool because I still have another round to go and I want to come home with the gold medal.
"There's talk about a world record but if I finish fifth it's all in vain. I just want to concentrate on trying to win. I was planning for about 6.45 but I've got an added bonus, Christmas has come twice for me."
Williamson and Pickering have both got good chances of medalling on Sunday.
The 23-year-old Williamson, impressive at February's Grand Prix in Birmingham, looked comfortable in his first heat and was the second quickest in the semis with an encouraging strong finish.
Pickering, who has had an indifferent indoor season, overcame a sluggish start in the same semi-final as Chambers to grab an excellent third spot.
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