Lewis Hamilton and Max Verstappen have traded the Formula One championship lead four times in six races and Sunday’s U.S. Grand Prix in Austin could provide yet another twist in the tale. Red Bull’s Verstappen leads Hamilton by six points after 16 of 22 races but the Circuit of the Americas holds happier memories for Mercedes’ seven times world champion. There was no race last year due to the COVID-19 pandemic but Hamilton clinched his sixth title in Texas in 2019 after celebrating his third there in 2015. No driver has been more successful than the Briton in Austin, with Hamilton enjoying five wins from eight starts. Every winner has also started on the front row and Mercedes have taken pole position in the last six. “Austin has been a Hamilton stronghold for quite a few years now,” observed Red Bull team boss Christian Horner after Verstappen took back the …