While former Super Aguri F1 team-mate Takuma Sato is being touted as a possible member of Scuderia Toro Rosso in 2009, Anthony Davidson's future may lie outside of Formula One altogether.

Sato was this week granted a test with STR, set for Jerez in mid-September, but the possibilities for Davidson's future remain few and far between, despite the Briton insisting that he would be happy settling back into a development role if it meant that he kept a high enough profile for race teams to remember him.

It was helping teams, notably BAR and Honda, to hone their Formula One machines that first brought Davidson to the forefront and, after a couple of abortive outings with Minardi in 2002, he finally earned a full-time race seat, at the behest of Honda, following the creation of Super Aguri F1. Ironically, after just one season and a handful of races before SAF1 bit the dust, it is that link to the Japanese marque that may now see Davidson suspend his Formula One ambitions, at least temporarily, in order to ensure that he is fully employed next season.

The Briton was a guest of IndyCar Series frontrunner Panther Racing at last weekend's Detroit round and, according to the official series website, should have tested with the team a couple of weeks ago, only for a shoulder injury - sustained while training on a mountain bike - to derail the plans. Honda is the official engine supplier of the IndyCar Series, and has made no secret of trying to help both Davidson and Sato find alternative rides following the collapse of Super Aguri after May's Spanish Grand Prix.

The Briton is not entirely alien to the US open-wheel scene, having been offered the chance to quit his test driver role at Honda to join leading the Champ Car World Series outfit Newman/Haas Racing as long ago as 2005, but eventually opted to pursue his goal of racing in F1 instead of replacing Bruno Junqueira, who had broken his back, ironically, in a one-off IndyCar outing at Indianapolis. The rid eventually went to Oriol Servia who, like Junqueira, has been a full-time member of the now unified IndyCar Series this season..

Since Davidson's visit to Detroit, Panther has signed fellow Briton - and former karting rival - Dan Wheldon to race the #4 Dallara next season, but is reportedly trying to find the finance for a second entry as the IRL-sanctioned series regains some of its former lustre. While current Panther driver Vitor Meira would be high on team boss John Barnes' shopping, list, Davidson is tipped as a serious contender, along with GP2 race-winner Mike Conway, who wowed onlookers - including several other IndyCar teams - with an impressive testing debut at Infineon Raceway last month.