It's true that Suryakumar Yadav, one of the standout performers of this year's World Cup, went past 1000 runs in 2022 during his unbeaten 61 in the last group game, against Zimbabwe in Melbourne.
Seven men have made double-centuries on Test debut, but - rather surprisingly perhaps - only two men have reached 200 in their second match. Pride of place goes to Zaheer Abbas, who made a sublime 274 in his second Test for Pakistan, against England at Edgbaston in 1971. Three years later, David "Bumble" Lloyd of England made 214 not out in his second Test, against India, also at Edgbaston. It was the first of Zaheer's 12 Test centuries, but Lloyd's only one.
The current tournament is the eighth edition of the men's T20 World Cup, and you're right in saying that no host nation has ever won it. The best performance by the hosts came in 2012, when Sri Lanka got to the final at the Premadasa Stadium in Colombo, but lost to West Indies. India reached the semi-finals in 2016, but also lost to eventual champions West Indies, in Mumbai.
The South African Rilee Rossouw scored 100 not out against India in Indore in October, and in his next visit to the crease hit 109 against Bangladesh in Sydney during the T20 World Cup. He did play one match in between, against Zimbabwe in Hobart, but didn't bat in that game.
The leader here is the much-missed Australian legspinner Shane Warne, who sent down no fewer than 439.5 overs (2639 balls) during the 1993 Ashes series in England. That was a six-Test series: the records for a five- and four-Test series are both held by the same man, the West Indian slow left-armer Alf Valentine. He sent down 430 overs (2580 balls) during the five-match home rubber against India in 1952-53, and 422.3 (2535 balls) during the four Tests of his debut series in England in 1950.
Steven Lynch is the editor of the updated edition of Wisden on the Ashes