Former India captain Sourav Ganguly feels that the Indian bowling attack does not require a total overhaul but wants off-spinner Ravichandran Ashwin replaced with left-arm spinner Pragyan Ojha.

Ganguly said Ashwin hasn't bowled well in the first two Tests, as spin accounted for just four of the 24 Australian wickets to fall in the series, and backed the 25-year-old Ojha to play in Perth.