Day 4: Morning

Join the conversation: @iaaforg

And that wraps up the action from this morning session. We'll be back at 7pm for this evening's session. 12:43:56

Men's discus qualifying is done. Six auto qualifiers, six others over 63.55m to make it through. Pestano & Olgundeniz miss out. 12:39:17

Britain's Lawrence Okoye saves his best for last to hit an automatic qualifier with 65.28m. 12:30:17

Three of the eight women from the 1500m heats who had run sub-4 this year failed to make the semi-finals. 12:28:57

Genzebe Dibaba also faded in that heat, she's being taken off the track in a wheelchair. 12:20:27

Gerd Kanter gets a good throw out on his third and final attempt with 66.39m. The best of the day. 12:19:23

Turkey's Bulut wins that 1500m heat in 4:06.69 from Uceny, 4:06.87. Kipyegon had been in a qualifying spot but faded badly at the end. 12:18:21

Sub-four runner Yekaterina Martynova of Russia is out though, finishing seventh in a very close finish. 12:09:13

World champion Jenny Simpson just scrapes through into the next round, grabbing the sixth and final auto spot in 4:13.81. 12:08:10

A slower tactical race in the second 1500m heat with Dobriskey coming through to win in 4:13.32 from Hilali. 12:07:31

Two-time world champion Robert Harting responds with 66.22m. Outside of the Sydney Games, that's the best ever mark in discus qualifying. 11:57:37

Jorge Fernandez of Cuba produces the best mark of the day in discus qualifying, 65.34m. 11:56:16

Aregawi will take this one from Tomashova, 4:04.55. 11:55:07

The first six of each heat with qualify along with the six fastest losers. Tomashova currently leading. 11:52:27

Women's 1500m heats now. This has been one of the highest quality events of 2012. Four women in this first heat have gone sub-4 this year. 11:49:20

Martin Wierig currently leads this second group in discus qualifying with 64.13m. 11:43:44

It means that Borzakovskiy is officially through to the semis now. 11:40:58

Duane Solomon impressed in that final 800m heat, easing up before the line as Lathouwers comes through. Solomon wins in 1:46.05. 11:40:41

Mohamed Aman wins that sixth and final heat in 1:47.34 in a close finish. Borzakovskiy still hanging on as fastest loser. One more heat to go. 11:33:08

Lolo Jones empathises with Brigitte Foster-Hylton's disappointment earlier. Says: "If she had punched me, I'd have understood." 11:32:10

Women's shot qualifying is done. Notable absentees from the final include Kleinert, Camarena-Williams, Borel, Rosa, Pravalinskaya-Karolchyk and Avdeyeva. 11:27:40

A much slower 800m heat there, Hamada Mohamed of Egypt winning in 1:48.05 from Sajad Moradi and Kevin Lopez. 11:25:46

Makhloufi, the impressive qualifier to the 1500m final, has pulled up in his 800m heat. 11:23:37

Nadine Kleinert is out of the shot final. Jill Camarena-Williams in 15th overall with one throw left. 11:21:25

2004 champion Borzakovskiy is currently the third fastest loser with 1:46.29, but there are two more heats to go.... 11:18:07

A very close finish in that heat but Nick Symmonds wins in 1:45.91. Harris second, Kszczot third and Bosse a close fourth. 11:16:37

This means we've seen the two best marks ever in an Olympic qualifying round in the women's shot. 11:12:50

Valerie Adams sends one flying out to 20.40m! 11:12:13

Abubaker Kaki wins the third 800m heat in 1:45.51 from Timothy Kitum (1:45.72). 11:09:42

All three Chinese athletes - Li Ling (19.23), Gong Lijiao (19.11) and Liu Xiangrong (18.96) - have automatically qualified in the shot. 11:03:18

Balla and Osagie grab the other automatic qualifying spots. 11:01:01

World record-holder pulls away effortlessly to win that 800m heat in 1:45.90, the exact same time as Amos in heat one. 11:00:39

Group A in discus qualifying has finished. Top four are Gowda, Hadadi, Malachowski and Alekna. 10:59:11

In fact, 20.76m is the best mark in qualifying of ANY competition in history, not just Olympics. 10:57:12

Ostapchuk's 20.76m is the best ever mark in shot qualifying at the Olympics. Previous best was 20.39m by Losch in 1988). 10:55:28

Big throw from Nadezhda Ostapchuk - 20.76m! 10:54:33

World junior champion Nijel Amos wins the first 800m heat (1:45.90) as Poland's Marcin Lewandowski is just sixth. 10:52:25

The women's shot qualifying is underway. 18.90m is the automatic mark, China's Liu Xiangrong just came within a whisker of that with 18.87m 10:48:29

Lolo Jones wins that heat in 12.68. 2009 world champion Brigitte Foster-Hylton clipped the fifth hurdle and is out. 10:42:31

Malachowski's discus lands right on the tape for the automatic qualifying mark. It's measured at 64.65m 10:37:31

12.57 is the fastest ever first-round time at the Olympics, but these are effectively quarter-finals (12.47 fastest ever QF). 10:36:34

12.57 from world champion Sally Pearson to win her 100m hurdles heat 10:34:27

European champion Nevin Yanit beats Olympic champion Dawn Harper in the fourth 100H heat, 12.70 to 12.75. 10:27:46

Vikas Gowda gets an automatic qualifier in the discus, 65.20m. 10:23:58

Kelli Wells - the woman who beat Sally Pearson earlier this year - takes the third 100m hurdles heat in 12.69. 10:21:16

Today is the 20th anniversary of Kevin Young's 400m hurdles world record. And later on today is the men's 400m hurdles final! 10:20:10

After Ennis and Greaves DNS, the winner of the second 100H heat was Schrott in 13.09. Kemp runs 13.51 in third to progress. 10:14:41

Ehsan Hadadi is the first automatic qualifier in the discus, 65.19m. 10:09:50

Talay of Belarus comes through to take the first 100H heat in 12.71 from Zelinka (12.75) and Porter (12.79). 10:08:09

The automatic qualifying mark in the men's discus is 65m. 10:01:30

Welcome to day four! A busy session this morning with heats for women's 100m hurdles, men's 800m and women's 1500m. Also men's discus qualifying. 09:55:27

Jonathan Mulkeen

blogger for IAAF

Athletics nut, writer, designer, photographer, cake eater and father of a future Olympian. @JonMulkeen | @statman_jon

Sessions

Day 4: Morning

Jonathan Mulkeen

Sessions

Day 1

Day 2

Day 3

Day 4

Day 5

Day 6

Day 7

Day 8

Day 9

Day 10