Farah wins historic World Championships 5000m gold
Farah celebrates winning the final of the men's 5000 metres athletics event at the 2015 IAAF World Championships
Mo Farah tore down the 5,000 metres home straight to rewrite the record books with another long distance world title double on Saturday - before Usain Bolt and Justin Gatlin were to meet for the last time in Beijing.
Farah is the first to win three 5,000m world titles in a row, to get back-to-back 5,000m/10,000m doubles at the worlds, and to get three straight doubles overall at worlds and Olympics.
The Briton stormed past Kenya's Caleb Ndiku down the last 100m for an emphatic victory to cement his status among the all-time greats.
Elsewhere, Marina Arzamasova won the 800m for Belarus, Russia's Maria Kuchina the high jump, and Slovakia's Matej Todt won the 50km walk with an extraordinary solo effort for almost the entire distance.
Olympic champion Ashton Eaton of the US was just one 1,500m run away from defending the decathlon title, leading with 8,216 points from Canada's Damian Warner (7,960), and Germany's Rico Freimuth (7,862).
Apart from the completion of the decathlon the other finals are the men's 4x100m and discus; and the women's 4x100m.
The men's sprint relay will see the final Beijing showdown between Jamaican 100m and 200m champion Bolt and American challenger Gatlin. Both teams won their heats, with Bolt rested.
Bolt is seeking a record 11th world title and a fifth major event title treble.
While Bolt is the sprint king since 2008, Farah has won every big distance race since the 5,000m at the 2011 worlds which now covers seven races.
On Saturday, he trailed at the back of the field for the first half of the race before moving up. Ndiku raised the pace with 800m to go and Farah was still second at the bell.
But once they reached the final home straight Farah accelerated and sprinted to the line for victory in 13 minutes 50.38 seconds.
Ndiku took silver in 13:51.75 and the bronze went to Hagos Gebrhiwet of Ethiopia in 13:51.86.
In the 800m, title holder Eunice Sum led the 800m at the bell but Arzamasova then moved ahead and kept the lead through the home straight for gold in 1:58.03.
Canada's Melissa Bishop came up strong on the inside to grab silver in 1:58.12, as Sum had to settle for bronze in 1:58.18.
"I dreamed about the world title all my life and now I have this medal. I knew all the girls could finish strong so I started it with 200m to go," Arzamasova said.
Kuchina meanwhile got her first big high jump title when she beat former champions Blanka Vlasic of Croatia and Anna Chicherova of Russia on countback after all had cleared 2.01m but failed on 2.03m.
Todt had a super-human solo effort in the 50km walk to get a first ever worlds gold for Slovenia on a sticky and hot morning in 3:40:32 hours, 1:45 ahead of Australia's Jared Tallent, with Japan's Takayuki Tani on bronze.
"I feel like a champion," Todt said. "I have to say that this 50km was maybe the easiest race in my whole life."
In other preliminary action, the US led the way in the men's and women's 4x400m relay heats. For the Americans, nine-time world champion Allyson Felix is to compete in both women's relays.