Switzerland's Sebastien Buemi will start his fifth year as Red Bull reserve driver next season, the Formula One team said on Tuesday.
The Swiss tennis great will lower the flag to start the 93rd edition of the endurance race on June 14.
Kubica won the race in his fifth attempt, his first three in the second tier LMP2 category, to become Poland's first overall winner since Le Mans was first staged in 1923.
Formula One leader Jenson Button banked his fourth victory in five races on Sunday after a Spanish Grand Prix strategy switch that stunned his downcast Brawn GP team mate Rubens Barrichello.
Toro Rosso will launch their new STR4 Formula One car at a test in Barcelona on Monday, the race-winning team said on Wednesday.
Portuguese racer Antonio Felix da Costa and Spain's Carlos Sainz junior will test for Formula One champions Red Bull at next month's young driver session at Silverstone, the team said on Friday.
Williams' Nico Rosberg dominated Formula One's first day of practice at the Australian Grand Prix on Friday while McLaren's world champion Lewis Hamilton languished near the bottom of the timesheets. Germany's Rosberg, son of Finland's 1982 champion Keke, lapped quickest in both of the afternoon sessions at a sunny Albert Park while Hamilton was 18th of the 20 drivers in the second.
A stony-faced Michael Schumacher was brought crashing back down to earth on Saturday when his Mercedes failed to break into the third qualifying session at the Australian Grand Prix.
Force India's Giancarlo Fisichella posted the eighth fastest time while completing 97 laps as the VJM02 car displayed immaculate reliability for the third day on the trot at the Circuit de Catalunya in Barcelona. Fisichella's best lap of 1min 21.545 was better than Toro Rosso's Sebastien Buemi (1:21.569) and McLaren's Lewis Hamilton (1:21.657) whose first experience with the new aero package of the MP4-24 concluded with a crash after 86 laps.
Swedish driver Felix Rosenqvist won the first of two Berlin ePrix races on Saturday to hand India's Mahindra team a maiden victory in the Formula E electric series.
DS Penske's Jean-Eric Vergne won Formula E's first race in India
Brazilian Nelson Piquet junior became the first Formula E champion on Sunday as the new electric series wrapped up its debut season with a race that had the crowd making more noise than the cars.
The double world champion retired his McLaren for the second race in a row while he had been running in a points-scoring position.
Summary of sports events and persons who made news on Sunday
Summary of sports events and persons who made news on Thursday