ATHLETICS WORLD CHAMPIONSHIPS
Venue: Olympic Stadium, Berlin Date: 15-23 August
Coverage: Watch the action live and highlights on BBC Two, BBC HD, Red Button, Radio 5 live and the BBC Sport website (video for UK users only)
Full BBC coverage details
Highlights - Ennis wins 2009 World Championship heptathlon gold
Jessica Ennis looks poised to claim Britain's first World Championship heptathlon gold following a stunning opening day in Berlin.
Ennis topped the standings in three out of the four events to record the third-highest first-day heptathlon total.
The 23-year-old lies on 4124 points, 307 points ahead of Ukraine's Olympic champion Nataliya Dobrynska.
Elsewhere, GB duo Christine Ohuruogu and Nicola Sanders came through their opening 400m heats.
Olympic champion Ohuruogu came second in her heat, clocking 51.30 seconds behind main rival Sanya Richards, the gold-medal favourite recording 51.06.
Sanders, the world silver medallist, was also second in her heat, easing up in 51.64 behind Russian Antonina Krivoshapka (51.03), but looked to be in good shape ahead of Monday's semi-finals.
Ennis was fastest in the 100m hurdles with 12.93 seconds, then won the high jump with her leap of 1.92 metres before throwing a shot put personal best of 14.14 metres.
She was then fastest in the last event of the day, the 200m, recording a time of 23.25 seconds.
Ennis was half a second faster than any of her rivals in the hurdles and was the leader in the high jump with 1.92m, despite failing with three attempts to equal her personal best and British record of 1.95m.
Her total sees her go third in the all-time first-day record list behind Jackie Joyner-Kersee and Carolina Kluft.
Ennis 'can't believe' first day heroics
"I can't believe it," Ennis told BBC Sport. "It is looking good, but I don't want to get carried away. There are three events to go and I just need to get them right."
Day two of the heptathlon on Sunday involves long jump, javelin and the 800m.
Elsewhere, Kate Dennison had a clearance of 4.55m to qualify for the pole vault final. It was the only height defending champion Yelena Isinbayeva needed to attempt to qualify.
There were mixed fortunes for Britain's men in the heats of the 1500m.
Andy Baddeley and James Brewer both qualified for the semi-finals but Tom Lancashire missed out.
Brewer, appearing in his first World Championships, came third in his heat, running a personal best time of 3 mins 37.17 secs.
"It was quite a physical race, but I felt comfortable," he told BBC Sport.
Baddeley came through his heat in a time of 3:45.23.
"I came into the home straight and expected everyone to kick, but I held on and I think there is more in there," he said.
"I'm really pleased with that, it was a solid run and I felt good.
"I expected it to go quicker a lot sooner, but it was all about staying out of trouble. I am confident as I know how well I have trained in the build up to this."
Lancashire came home eighth and failed to gain a place among the fastest losers.
In the 400m hurdles, David Greene won his heat in a time of 48.76 with double Olympic champion Angelo Taylor of the United States in fourth.
Greene was the fourth fastest qualifier overall but fellow Welshman Rhys Williams missed out despite a late burst to finish fifth in his heat.
Carl Myerscough qualified for the shot final but could only finish 11th with a best of 18.42m followed by two fouls.
There was also disappointment for Helen Clitheroe in the women's 3,000m steeplechase as she missed out on qualifying from the heats.