One World Cup match stands between England and the last 16 at Qatar.

A draw with the USA puts Gareth Southgate’s side on four points after two games, with the 6-2 thrashing of Iran also boosting their goal difference.

Wales await in the final group stage match, with England in prime position to reach the knockout stages of the tournament.

Top spot is also valuable, knowing they will avoid the winners of Group A should they hold on, with Iran just a point behind on three points, USA on two and Wales bottom on one.

Here are the permutations for England to advance to the last 16 and also secure top spot:

What do England and Wales need to qualify from Group B?

England are not qualified from Group B yet after a goalless draw with the USA. Gareth Southgate’s side are on four points, with Iran, USA and Wales also still able to progress.

The equation is simple for the Three Lions: Avoid a four-goal defeat to Wales on Tuesday.

To secure top spot: Win. Simply. But top spot is still England’s if they draw unless Iran beat the USA or the USA beat Iran by at least four goals. Top spot is also England’s if Iran and the USA draw and they avoid a loss to Wales by four or more goals.

The route for Wales is trickier. The first part is arguably the hardest: Beat England and hope for a draw between the United States and Iran.

But if the USA vs Iran match is not a draw, Wales must beat England by four goals to advance.

To secure top spot: Beat England by four goals with a draw between USA and Iran.

The United States have a straightforward equation: Win. Iran have an easier route, a draw is enough, unless Wales beat England.

How is qualification decided?

Should teams be level on points after three games, then progress will be determined by goal difference, then goals scored, then the head-to-head results between the relevant sides. It then gets complicated from there...

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