ABU DHABI : Brazilian Gabriel Bortoleto won the Formula Two championship in Abu Dhabi on Sunday ahead of his move to Formula One with the Sauber team next season. The 20-year-old Brazilian was Formula Three champion last year and he secured back-to-back titles after finishing second at Yas Marina while French rival Isack Hadjar stalled on the grid in the season's final feature race. Bortoleto finished the season with a total 214.5 points to Hadjar's 192. Paraguayan rookie Joshua Durksen, who