Three key battles in Berlin
Many people ask if there is an Olympic hangover for an athlete the season after a Games. Not for me there wasn't.
A new season meant a new mission and this season that means the World Championships in Berlin.
There are those who left Beijing last year with gold and want to add another too show the world they are deserving of being the reigning Olympic champion.
And there are those who, in their minds, under-performed or had injuries in Olympic year, so want to make up for that.
One thing that stands out for me this year is potential head-to-head battles between athletes who got it right in Beijing and those who didn't.
Here are just three. Who do you think will win?
I'm Katharine Merry, former world 400m number one and an Olympic bronze medallist at Sydney 2000. I'm now a mentor to junior athletes as well as working in radio and TV, and as a trackside presenter at major events. I'll be aiming to give you a behind-the-scenes insight to the world of athletics.
