Conversation so far:
What happened during the Anquetil years?
Poulidor's best chance of defeating Anquetil came in the 1964 Tour de France, in the finish on the Puy de Dome.
Did he finish in second place in the 1964 Tour de France?
Poulidor gained time but when they reached Paris, Anquetil still had a 55-second lead and won his last Tour de France thanks to the time-trial on the final day.
Did he ever beat Anquetil?
CANNOTANSWER.
How many times did he face off against Anquetil?
CANNOTANSWER.
Is there any interesting information?
Poulidor's riding style was aggressive and attacking, whereas Anquetil preferred to control the race in the mountains and win time in the time-trials.
Apart from 1964, did they have any other close races?
CANNOTANSWER.

Question: When was their last race against each other?
Self-contained rewrite: When was Raymond Poulidor and Anquetil's last race against each other?