Sir Vivian Richards 189 runs off 170 balls ()
As per Wisden list published in Feb 2002, Top Ten Individual batting performances are as follows:
# 1 - Sir Vivian Richards (West Indies) - 189* runs off 170 balls against England at Old Trfford in 1984. West Indies won the match by 104 runs
# 2 - Sir Vivian Richards (West Indies) - 138* runs of 157 balls against England at Lord's in 1979 World Cup final. West Indies won the match by 92 runs