Thomas Tuchel has a lot to consider. The England manager is set to announce his group of 26 players for the World Cup on Friday, and there are a handful of key decisions that will shape the squad that travels across the Atlantic this summer.Until now, Tuchel’s reign as England manager has been pretty straight forward. They qualified for this summer’s tournament with a perfect record, winning eight out of eight. At the World Cup itself, however, England’s true measure will be taken.Here, we run through five key decisions Tuchel must make, and how the betting markets rate those big calls.Starting left-backEngland’s long-standing problem position might not be the abyss of options it was at Euro 2024, when a half-fit Luke Shaw was taken to Germany purely because Gareth Southgate lacked other candidates to play there. But Tuchel still has plenty to consider.Myles Lewis-Skelly, Reece James, Tino Livramento and Nico O’Reilly all started on the left side of defence in qualifying, with the latter perhaps the best bet to keep that place for the World Cup.O’Reilly has become a first-team figure for Manchester City this season, giving Pep Guardiola’s side an extra dimension with his driving runs and ability to play through the middle. The 21-year-old came through as an attacking midfielder and that is clear in the way he plays.James is the most accomplished option Tuchel could use at left back, but he is more comfortable on the right side and might not be fit enough to make a World Cup match every five days.O’Reilly (1/7) and James (1/5) are odds-on to make Tuchel’s World Cup squad, with Shaw (1/1) after his goalscoring appearance for Manchester United against Nottingham Forest.Centre-back pecking orderSimilar to the left-back position, Tuchel has options in central defence, but it is unclear how things will shake out when the England manager has to put names on a sheet.Marc Guehi (1/40), Ezri Konsa (1/14), Harry Maguire (1/4) and John Stones (3/10) are all odds-on to be included in Tuchel’s squad, while Dan Burn (4/9), Fikayo Tomori (4/6) and Jarell Quansah (5/6) are in the running.