Put your questions to Michael Johnson
A few weeks back it was Usain Bolt. This time it's the man who preceded him as 200m world record holder and righteous wearer of the golden spikes - Michael Johnson.
What a line-up.
The deal is the same - post your questions down below, and I'll choose the most original, interesting and creative to put to the one-lap legend and BBC Sport expert when I sit down with him on Thursday.
Anything smeared in smut/libel/foolishness gets the instant heave-ho. Fair?
They're your questions, so I'll merely be the mouthpiece - but should you need suggestions, it'd be foolish to ignore the following tasty topics:
* whether and when he thinks Usain can steal his 400m world record too
* what Christine Ohuruogu has to run to win the Worlds this summer
* how fast he can still run over 400m
Over to you...