22nd seeded Bulgarian took the second set after late break.In the third set Cervantes had a chance while serving for the set at 6-5 but could not capitalize.In the tie-break the Spaniard reached to set-point which Dimitrov saved and eventually the Bulgarian won the set and the match.
Dimitrov leads 2-1 in the matches played Chardy so far.
In the last clash In Brisbane in 2015 Dimitrov won in the second round.
Grigor Dimitrov moved with 10 positions to No 24 in the ranking of ATP World Tour after reaching the semifinals of Cincinnati Masters.
Marin Cilic of Croatia who beat Dimitrov in the semifinal and won his first Masters title after defeating Andy Murray in the final re-entered Top 10 at No 9. The Swiss players in Top 10 switched places - Stan Wawrinka is no 3 ahead of No 4 Roger Federer.
The second ranked Bulgarian Dimitar Kuzmanov drops to No 302. Grigor Dimitrov advanced to the Masters tournament semi-finals for the first time since 2014.