Mo Farah and Dafne Schippers, arguably Europe's two biggest track stars, will hone their Olympic preparations with what promises to be two testing outings at Friday's Monaco Diamond League.

Farah, reigning Olympic gold medallist in the 5000m and 10,000m and defending two-time world champion in both events, will warm up for Rio, just three weeks away, with some speed work over 1500m.

It is an event he has run before, famously setting a European record of 3:28.81 in 2013.

Farah clocked 3:28.93 to finish fourth in the event at last year's meeting and another fast time looks a certainty as he goes up against the top Kenyan trio of three-time world 1500m champion Asbel Kiprop, world silver medallist Elijah Manangoi and Ronald Kwemoi.