Highest Batting Average in FC cricket at Time of India Test Debut

Courtesy: Google (for all images)

FC Matches - 27, Avg. - 88.37 

Vinod Kambli

FC Matches - 23, Avg. - 81.23 

Pravin Amre

FC Matches - 15, Avg. - 80.21

Yashasvi Jaiswal

FC Matches - 38, Avg. - 71.28

Rusi Modi

FC Matches - 9, Avg. - 70.18

Sachin Tendulkar

FC Matches - 45, Avg. - 69.85

Sarfaraz Khan

FC Matches - 23, Avg. - 68.78

Shubman Gill