Sebastien Buemi has admitted that continued clashes between Formula E and the FIA World Endurance Championship could hinder his chances of remaining in the all-electric series in future.

Calendar clashes between Formula E and the world’s premier sports car racing series have been commonplace ever since the third season of Formula E, when the fourth round of the season in Mexico City round clashed with WEC’s prologue test, then the double-header in New York clashed with WEC’s race at the Nurburgring.

The clashes have affected many over the years, including current drivers in both series Buemi, Jean-Eric Vergne, Nyck de Vries, Norman Nato, and Stoffel Vandoorne, Buemi said following the recent Monaco E-Prix that if it continues, he may need to start choosing one over the other.