New Delhi, April 28 -- Sabastian Sawe hopes the stringent testing regime he underwent before becoming the first person to break the fabled 2-hour barrier in marathon running will prove to the world he is competing clean.

The 29-year-old Kenyan pulled off the feat that was long considered unthinkable when winning the London Marathon on Sunday in a time of 1 hour, 59 minutes and 30 seconds.

There have been a slew of high-profile doping cases involving Kenyan runners in recent years, notably women's marathon world record-holder Ruth Chepng'etich getting a three-year ban in October.

So, in agreement with his coaches and management team, Sawe said he volunteered to undergo "multiple" doping tests to dispel any suspicion around his own perfo...