Ennis-Hill hoping for doping-free worlds

Dame Jessica Ennis-Hill remains hopeful London’s World Championships will not be tarnished by doping but warned any problems will not disappear overnight.

The 2012 Olympic heptathlon champion wants to see a clean summer as she prepares to collect her third World Championship gold.

Ennis-Hill , pictured, is due to receive heptathlon gold from Daegu 2011 after she was upgraded from silver when Tatyana Chernova was stripped of her title last November following a doping offence.

Jo Pavey is also in line to receive a 10,000 metres World Championship bronze from 2007 after she moved up from fourth last month when Turkish athlete Elvan Abeylegesse retrospectively failed a doping test.

She is dueto join Ennis-Hill ata ceremony in London in AugustandEnnis-Hill,who retired lastyear, hopesothers will avoid their longwait.

“We have made massive steps to becoming a cleaner sport in the past year but there’s a lot that needs to be done,” she said.

“It’s not something that’s going to happen in a short amount of time. Hopefully we have a fantastic World Championships and we don’t have this case of three, four or five years down the line where people are having medals stripped off them.

“I hope as we continue with our sport over the next few years it just gets better and better.