Reigning Olympic and world heptathlon champion Jessica Ennis-Hill has been ruled out of the indoor athletics season after she sustained an achilles tendon injury during training.

Ennis-Hill did not put a time-scale on her return to action, but said she hoped to be able to enjoy a full outdoor season, starting at the Hypo Meeting in Gotzis in late May and building up to the Olympics in Rio.

Asked if the injury put her participation in Rio in question, Ennis-Hill told Sky Sports News on Friday: "At this stage I'm hoping that's not the case. We're still in February, there's a lot of time before the Olympics.

"I'll be going away and sitting with the medical team to go through everything. Hopefully it won't impact on my summer."
Ennis-Hill, 30, won the world indoor pentathlon in Doha in 2010 and silver in Istanbul two years later, before skipping Sopot in 2014 because she was pregnant.

This season's world indoors will be held in Portland, Oregon, on March 17-20.

The 30-year-old has suffered persistent achilles problems in the past, but was optimistic the latest problem could even help her Olympic preparations.

"We need to work out how long I need for rest and recovery but I very much want to have a full season, starting in Gotzis, and starting the season as originally planned," she said.

"As an athlete it's so frustrating to get injuries at any time of the year, but we are still in February so maybe a little bit of rest is not a bad thing and if we can get this sorted hopefully that will stand me in good stead."