David Rudisha will return to action tomorrow in Lausanne, Switzerland; not quite a week after running a world leading opener of 1:43.46 in France (last Friday). Expect Rudisha to have some competition from an excellent field, comprised of Amine Laalou, Marcin Lewandowski, Mbulaeni Mulaudzi and Kenyans Asbel Kiprop and Alfred Kirwa Yego.
On the American front, most will be skipping to cross pond flight, coming off the USATF Championships this past weekend, but one entry of note is women's 1500m winner Morgan Uceny. Uceny already has the A-standard, but will get more practice at running in a championship field and will likely be looking to crack the 4:00 barrier for the first time. Here's the field she'll be up against.