Having completed his five race spell driving the number 53 Manor Marussia Formula One car, Alexander Rossi returns to GP2 driving duties with the hope that he has done enough to secure a full time future at the pinnacle of the motor racing ladder, Formula One. Standing in for fellow Grand Prix rookie Roberto Mehri in Singapore, Japan, the United States, Mexico and Brazil, Rossi will be hoping his stock has increased sufficiently to find himself a berth on the grid come lights out next season, or at very least give himself an opportunity to work with one of the bigger teams on the Grand Prix grid in a third driver/reserve role. With only drives available at Manor Mercedes next season and with the team already aware of the American's potential behind the wheel of a Formula One machine, Rossi's F1 prospects do look promising going into the winter off season. Soon-to-depart Manor founder, John Booth, has been suitably impressed with his young charger in his brief Grand Prix career, commenting to press at Interlagos on the positive impression Rossi has made within the team and the contribution to results on track, said Booth, "I'd like to commend Alexander on five very strong races with us and it has been a pleasure to have him around,". For his part, Rossi was full of praise and gratitude to the British squad who gave him his (long awaited) debut back in September, "I would have liked my final Formula 1 round of 2015 to have a better outcome, but I look back at the five races I've had since Japan and I'm pretty happy overall. It's been a totally positive experience and I know I've given it everything I've got. So now we wait and see what the future brings, but I want to thank the team for this incredible opportunity to show what I can do and I hope I've done that." Rossi has an impressive record against his somewhat underwhelming teammate Will Stevens, with honours falling to the American in both Qualifying (3-2) and the races (4-1). Although Stevens is far from Champion material it stands testament to the talents of Rossi that with minimal driving time in the Manor car he can come into the team late in a season and thoroughly out perform a teammate who has been driving the whole racing season. Should Manor be successful in its search for a top driver next season (both Kevin Magnussen and Pascal Wehrlein have been linked to a seat in recent months thanks to their affiliation with top teams) it would be interesting to see how Rossi stacks up against sterner competition in the sister car, and would allow fans a better idea if we are looking at the first American driver with the potential to take his talent all the way to the top of the World Championship table, or if he's simply been flattered by Will Stevens' relative lack of speed. Do you think Alexander Rossi has a chance of retaining his seat at Manor in 2016 or do you think he would be better persuing opportunities at different teams or outside of Formula One altogether? Leave you comments below !