Bielsa brought in Summerville in the summer of 2020 from Feyenoord, and last season he made his Leeds debut against Newcastle United under the Argentine.
Last season, the winger made a total of nine appearances in all competitions for the Whites, and Jesse Marsch took him on Leeds’ pre-season tour of Australia.
Summerville, who has featured three times for the Yorkshire outfit this season, admitted that the news of Bielsa’s sacking in February came as a shock for the Leeds squad.