Around 100 of the world's top male pentathletes and 60 of the top women will take part in the World Championships this weekend at Crystal Palace.
Olympic champion Lena Schoneborn admits she will find it tough, having taken time off to study since Beijing and is taking time to get used to the new combined run/shoot format.
Could Heather Fell or Katy Livingston beat her to gold?
What do you make of the men's event?
Olympic gold medallist Andrei Moiseev faces a battle with reigning world champion and Russian compatriot Ilia Frolov.
Do either of the leading Brits, Sam Weale and Nick Woodbridge, who finished 10th and 25th on their Olympic debuts in Beijing, stand a chance of making the podium?