Frenchman Sebastian Loeb is hoping to take another major step towards a seventh successive drivers' championship as he heads into this weekend's Rally of Bulgaria. Loeb has won three of the six races so far this season and has a 38-point lead at the head of the world rally championship. He is also unbeaten on tarmac circuits such as this. In spite of that he denies that he only has to slip his Citroen C4 into gear to claim yet another victory. 'It would be a huge error to think like that. We must approach each rally with humility,' he said, adding that conditions along the course were sure to play a part. 'We are going to be facing a new course and we will have to juggle with the weather because the specials at 2000 metres altitude can be interrupted by storms.' Loeb's Citroen teammate Dani Sordo of Spain is also looking forward to a run on the asphalt, his preferred surface which has given him 11 of his 24 podium finishes - all of them behind Loeb. All eyes, however, will be on another Frenchman driving for the Citroen Junior Team, Sebastien Ogier. The 27-year-old has been in impressive form this season, having won the last race in Portugal, and now lies second in the championship behind Loeb. With the Ford team already sniffing around - and with an offer on the table for him to switch next season - there is increasing interest in seeing whether this young pretender has a genuine chance of claiming Loeb's crown. 