Brendon Hartley will switch racing numbers for this weekend’s Mexican Grand Prix.

The Toro Rosso driver ran as number 39, one of Toro Rosso’s reserve driver numbers, when he made his debut last weekend at the Circuit of the Americas. Hartley, who is set to see out the rest of the season with the team, has now chosen to use number 28.

“It was a steep learning curve in Austin last week so I’m looking forward to putting some of the lessons learnt into practice this weekend here in Mexico,” said Hartley, who won the World Endurance Championship round at the Autodromo Hermanos Rodriguez circuit last month.

“It’s a tricky venue for the engineers, as the high altitude plays havoc on downforce and cooling, but from a driving point of view it’s a great track and one I really enjoy.”

Number 28 was last used by Will Stevens in 2015. Hartley previously used it in Formula Renault 3.5 in 2011.

Pierre Gasly will return to Toro Rosso this weekend for his third grand prix start.

“I’ve never raced there,” said Gasly, “so it will be exciting to learn a new one.”

“I’ve been there as a reserve driver with Red Bull for the last two years and I think it’s a unique event. The atmosphere there is very special, the fans are great and very passionate. The part of the stadium in the last sector is also amazing, always full of spectators cheering the drivers on. It’s great to see all the grandstands completely full.”

2017 Mexican Grand Prix