Cricinfo on the incredibly young Alastair Cook:
It was Cook's 23rd Test century and his third in successive Tests this series. Not only did that make him the leading century maker for England in their Test history but it also made him the youngest man from any country to pass the milestone of 7,000 Test runs.
He's almost 28 years old. If his body lasts another decade, then he'll likely become the greatest cricket player England has ever produced.