Australia extended their lead in the Group C of the Davis Cup with a win on Thursday against France, who are yet to win in the competition. The French side had the better start in Hamburg as Richard Gasquet beat Jason Kubler 6-2, 6-4, but Alex de Minaur levelled with a 6-3, 1-6, 6-4 victory over Benjamin Bonzi. The decision then went to the doubles match and Matthew Ebden and Max Purcell were outstanding to defeat Nicolas Mahut and Arthur Rinderknech 6-4, 6-4. Australia were victorious against Belgium in the first round, while France lost to Germany for the first time in the Davis Cup since 19…