Root's fifties…
Joe Root became only the third England player to reach 50 in at least one innings of every match of a five-Test series, following Wally Hammond in South Africa in 1938-39, and Peter May at home to South Africa in 1955. John Edrich went one better in 1970-71, reaching 50 in each Test of the first six-Test series, in Australia.
… and Root's average
Helped by his undefeated 149 at The Oval, Joe Root lifted his average in home Tests to 64.71, the highest by any Englishman with more than 1000 Test runs in England. Root edged ahead of Herbert Sutcliffe (64.60); Denis Compton (60.04) also averaged over 60. Ten other players, including Kevin Pietersen and Ian Bell, top the 50 mark.
Kohli doesn't flower
Virat Kohli's average of 13.40 is among the lowest for any top-order (1-6) batsman who played throughout a five-Test series. The lowest of all was 6.22 by Bill Playle of New Zealand, who made only 56 runs in nine innings in England in 1958. Then comes Learie Constantine (65 runs at 7.22 for West Indies in Australia in 1930-31), Tommy Andrews (49 at 8.16 for Australia in England in 1926), Mike Atherton (79 at 8.77 for England v West Indies in 1991), Pelham Warner (85 at 9.44 for England in South Africa in 1905-06), Peter Carlstein (77 at 9.62 for South Africa in England in 1960), Chandu Sarwate (100 at 10.00 for India in Australia in 1947-48), Gundappa Viswanath (96 at 10.66 for India v England in 1976-77), Louis Stricker (99 at 12.37 for South Africa in Australia in 1910-11) and Maqsood Ahmed (102 at 12.75 for Pakistan in India in 1952-53). Sarwate was the only one apart from Kohli to have ten innings.
ESPNcricinfo XI: Interesting statistics from the England-India series | Cricinfo Magazine | ESPN Cricinfo