TDS Racing and Greaves Motorsport have withdrawn their entries for this year's Le Mans 24 Hours.
Le Mans organisers the ACO said on Monday that the #59 Aston Martin Vantage V8 entered by TDS Racing in the GTE category, and the Greaves-entered Gibson 015S-Nissan in LMP2 will not take part in the race.
The Greaves entry was the first reserve for the endurance classic.
ACO also announced two more withdrawals from the reserve list: the #53 Riley Motorsports' SRT Viper GTS-R and the #87 Proton Competition's Porsche 911 RSR.
Following those decisions, Algarve Pro Racing has been invited to take part in the race with its Ligier JS P2-Nissan.
The Portuguese squad's first nominated driver for Le Mans is Michael Munemann.
The news means the Le Mans field breaks down as follows: nine P1 cars, 23 P2s, 14 GTE Pros, 13 GTE Ams and one Garage 56 entry.