McLaren is yet to make a decision on who will replace Fernando Alonso for the Monaco Formula 1 race when the Spaniard takes part in the 101st Indianapolis 500.
McLaren announced on Wednesday that Alonso would be joining the grid for the ‘500 on May 28, with the British team returning to the famous race after a 38-year absence alongside Honda and Andretti Autosport.
Alonso is set to visit Barber Motorsports Park next weekend for the Honda Grand Prix of Alabama, and will then fly straight from the Spanish Grand Prix on May 14 to begin practice at Indianapolis Motor Speedway the following day.
McLaren is now in need of a replacement for Monaco, with reserve driver Jenson Button being the most obvious choice, the Briton having stepped away from full-time racing at the end of 2016.
However, no firm decision has been made yet, with McLaren executive director Zak Brown expecting to make a call by the end of April.
“We have a good idea of who we’re going to put in the car,” Brown said when asked about a replacement by NBC Sports.
“We will be able to do that no later than the end of the month. Probably sooner.”
Button has not made any appearances in the F1 paddock since his retirement from last year’s Abu Dhabi Grand Prix, with his only scheduled appearance with McLaren being an event at Mazda Raceway Laguna Seca in the summer.
Should Button not wish to race, McLaren may turn to junior drivers Nyck de Vries or Nobuharu Matsushita, while British Formula E driver Oliver Turvey has also completed extensive simulator work with the team in recent years.