Argentineans Sebastian Donadio and Walter Perez lead the 38th Grenoble Six Day with two nights remaining. The pair took the lead from Denmark's Michael Mørkøv and Alex Rasmussen.
Donadio and Perez lead came thanks to their victory in Monday night's 35-minute pursuit, where they gained 16 points on the previous night's leaders. The duo also won the 36-lap sprint.
The French race, won in 2007 by Mørkøv and Rasmussen, ends Wednesday night.
(Additional editorial assistance by Susan Westemeyer.)