Eric Boullier has admitted McLaren is looking to eventually "refresh" its driver lineup.
Danish rookie Kevin Magnussen only debuted this year, but Mexican Sergio Perez was also only a single season into his McLaren career when he was ousted at the end of 2013.
It is rumored strongly that, ahead of the start of its works Honda partnership, Woking-based McLaren is seeking a top driver to spearhead the project, such as former team racers Fernando Alonso or Lewis Hamilton, or quadruple world champion Sebastian Vettel.
"I can only do my best and hope that is good enough," said Magnussen.
"Anyone at McLaren should feel that you have to deliver to your best to deserve to be there and that goes for me and Jenson as well."
It is believed that if McLaren does oust a current driver to make way for a newcomer, it would be the 2009 World Champion Jenson Button, 34, who is out of contract.
McLaren supremo Ron Dennis made waves recently when he urged Button to "try harder."