ATHLETICS WORLD INDOOR CHAMPIONSHIPS
Venue: Aspire Dome, Doha Date: 12-14 March
Coverage: Updates on BBC Radio 5 live.
Watch live at telegraph.co.uk
Ennis (centre) made a blistering start in the opening event on Saturday morning
Britain's pentathlete Jessica Ennis and sprinter Dwain Chambers were crowned champions at the World Indoors in Doha.
Heptathlon champion Ennis beat Olympic champion Nataliya Dobrynska and Russian Tatyana Chernova to add the pentathlon title to her outdoor gold in Berlin.
"It feels great to beat the three medallists from Beijing," Ennis said after racking up a record 4937 points.
Chambers overcame a slow start to clock 6.48s - the world's quickest this year - and beat Mike Rodgers to win the 60m.
After cruising through all the qualifying heats, the 31-year-old Chambers had to work all the way in Saturday's final before bursting past the American Rodgers (6.53) and Antigua's Daniel Bailey (6.57).
The European indoor champion was all smiles as he improved on the world indoor silver he shared in Valencia in 2008 and become the first Briton to win the title since Jason Gardener seven years ago.
After beating the world's best this year of 6.49 run by American Ivory Williams, missing in Qatar following his drug suspension picked up last Wednesday, Chambers said: "It was not an easy competition from beginning to end.
"I was a little bit slower from the blocks - that is why I wasn't as relaxed as I expected. It was the longest six and a half seconds of my life."
Britain's other sprinter Harry Aikines Aryeetey, 21, was missing in the final after the former world junior champion pulled up with an grade-one hamstring injury in the semi-finals.
It was a joyous return to the track for Sheffield athlete Ennis though who has struggled with a niggling foot injury since winning gold at the outdoor Berlin World Championships seven months ago.
"It is very special to win here and break the championship record," she said of her new mark, three points ahead of that set by Sweden's Carolina Kluft in Birmingham in 2003, but failed to beat Irina Belova's 18-year-old world record of 4991 points.
Chambers pips Rodgers on the line with 0.05s to spare
"I had a great year in 2009 so everyone was expecting me to win. I know the world record is within reach."
The day for the pentathletes began in stunning fashion as Ennis clocked 8.04s to win the 60m hurdles and was then the only one to clear 1.90m in the high jump to stretch the overall lead to 75 points.
In the morning's final event, Ukraine's Dobrynska threw 16.43m in the shot put to pile the pressure on, but Ennis, in an event that is not one of her favourites, dug deep after a poor 13.03 to claim a season's best 14.01m with her last attempt to edge ahead.
During the break Ennis said the long jump was "always tricky" but showed no pressure when she leaped a personal best 6.44m on her second attempt to regain the lead over Dobrynska, who could only make 6.33.
With Dobrynska, American Hyleas Fountain and Olympic bronze medallist Chernova needing a miracle in the 800m, Ennis dictated proceedings and came home behind Poland's Karolina Tyminska to grab the glory in a time of 2:12.55s.
Ethiopian Meseret Defar had the Doha stadium crowd on its feet after claiming a record fourth consecutive indoor title in the 3,000m clocking 8:51.17 after outsprinting Kenyan Vivian Cheruiyot on the last lap.
Reigning Olympic and world outdoor champion Steve Hooker won the pole vault with the Australian clearing a championship record of 6.01m as Britain's Steve Lewis finished joint-sixth.
Olympic gold medallist Bryan Clay ran a valiant 1,000m to take the heptathlon title ahead of fellow American and world champion Trey Hardee by 20 points after a fascinating competition with Aleksey Drozdov of Russia taking bronze.
Croatia's Blanka Vlasic, world outdoor champion, successfully defended her high jump crown with a best of 2.0m, while American Lolo Jones retained her 60m hurdles title with the third fastest time ever run in the event clocking 7.72s.
Other highlights saw Chris Brown, twice the bronze medallist, finally win the 400m in 45.96s, while Deresse Mekonnen defended his 1,500m title.
UK champion Andrew Osagie could not repeat his impressive efforts in the 800m on the opening day after being pipped on the line in his semi-final in a time of one minute 51.29s to just miss out on a final spot.
The British men's 4x400m relay team faced an anxious wait before hearing they had progressed to the final as fastest losers, while Carl Myerscough finished ninth in a shot put final won by American Christian Cantwell.
Team captain Jenny Meadows, bronze medallist at the World Championships last summer, will be going for 800m gold on Sunday.