Wilson Kipsang's younger brother Noah Kiptoo Kiprotich, 29, will pace his brother and former world record holder up to the 31-kilometre mark and is looking forward to a good run at next weekend's Berlin Marathon.

"I will be looking forward to a good race where I want to help my brother lower the course record, which is the world record. We have been hunting it for some time now," said Kiprotich.

Kiprotich, who started elite running in 2015, has been training with Kipsang since the latter returned from the New York Marathon last year and wants nothing but the best from his elder brother.

The Berlin Marathon has a flat and fast course which has seen the world record time fall six times.

Publicly, endurance-running icon Eliud Kipchoge has also has spoken of his desire to lower his marathon personal best of 2:03:05 - just eight seconds shy of Dennis Kimetto's world record mark - and competing on the world's fastest course gives him every opportunity to achieve his target as he seeks a third Berlin Marathon victory.

Kipchoge has been training in Kaptagat, Elgeyo-Marakwet County.