A new recruit will reportedly inject much-needed funds at struggling Marussia.
The team announced at Suzuka that Briton Will Stevens, currently a Formula Renault 3.5 driver but having previously tested for Caterham, has signed up as a reserve driver.
It was expected he would make his Friday practice debut at Suzuka, but boss John Booth said a "paperwork" holdup in Germany had delayed those plans for now.
Marussia said he will instead "take part in a number of free practice 1 sessions" elsewhere in 2014.
|Will Stevens. (Photo: Marussia F1 Team)|
It is believed Stevens, 23, is also a candidate for a race seat in 2015, possibly at the expense of fellow Briton Max Chilton, who almost missed the recent Belgian grand prix amid contractual problems.
Chilton, however, welcomed the news about Stevens at Suzuka.
"I know Will very well. He's a good friend of mine so I'm more than happy," he insisted.
British newspapers claim Stevens' job at Marussia has been facilitated by his backers.
The Times said he is paying "as much as 150,000 pounds ($243,000)" per Friday practice, while the Mirror estimated the cost at more like "around 200,000 pounds ($323,000)" per 90-minute session.