Qatar World Cup 2022: Four years out, what do we know so far?

Organisers say the total budget for the stadiums and training sites is $6.5bn (£5bn).

Concerns have been raised about the treatment of migrant workers building the new infrastructure, with human rights organisations condemning labour practices.

“Ever since Qatar was awarded hosting rights we’ve been pressing the authorities to clean up their act over the exploitation of migrant workers,” said Allan Hogarth, Amnesty International’s head of policy and government affairs.

“Promised reforms have been slow in coming and we remain concerned that 2022 will arrive and Qatar’s hundreds of thousands of foreign workers will still be facing exploitation and poor working and living conditions.”

Amnesty International said in September that dozens of migrants working on the city that will host the final had gone unpaid for months.

A spokesman for the Qatari government said the contractors involved, Mercury MENA, were not directly involved in the building of the stadium but in the building of the city.

Fifa president Gianni Infantino said the World Cup will “leave a great legacy”.

“On the social side, it has had a very important social impact in the whole region,” he added.

“When you think about all the debates on human rights and workers’ welfare… without the World Cup, these debates would not have happened and the improvements which happened would not have happened either.”

The tournament organisers said: “The health and wellbeing of our workers is our top priority. There are currently more than 30,000 workers on our sites.

“The SC’s worker welfare standards cover ethical recruitment, accommodation and working conditions. Regular audits support compliance, while contractors in breach of the standards are subject to enforcement measures, including contract termination and blacklisting.”