Ross Taylor does not toss and turn over cricket numbers, but he does take some interest.
So he might fancy taking a peek in a week at the world batting rankings.
Taylor's double hundred at Dunedin in the first test against the West Indies lifted him to a career-high seventh.
His century yesterday - making him the first New Zealand batsman to make a double and single century in consecutive tests - might bump him up another spot. But that depends on how those above him perform in the coming days.
For example, India's Cheteshwar Pujara is sixth on 801 points, and they are about to play two tests against South Africa, starting at Johannesburg next Wednesday night.