Argentina looks set to replace Korea on the 2013 formula one calendar.

That is the claim of Italy’s Autosprint magazine, reporting that the Argentinean national government will sign a three-year contract next month.

President Cristina Fernandez de Kirchner said last month that the 2013 Argentine grand prix, last held at the ageing Autodromo Oscar Alfredo Galvez in Buenos Aires in 1998, will take place on the streets of the coastal city of Mar del Plata.

Autosprint now quotes Argentine tourism minister Carlos Enrique Mayer as saying: “The national government accepts the challenge of organising the grand prix of Argentina to promote our country to the world.

“In May, the three year contract between all the parties involved will be signed,” he added.

The report said Hermann Tilke will be responsible for the 5 kilometre city layout.

Autosprint also reported that next year’s calendar will remain at 20 races, so with the addition of Argentina as well as New Jersey, two current grands prix will need to give way.

One place will likely open up due to a new alternating scheme in Spain, with Valencia to wait until 2014 for its next race.

And Autosprint added: “The grand prix of Korea no longer seems able to honour the financial obligations agreed with (Bernie) Ecclestone.”

After Red Bull’s Sebastian Vettel looked set to walk pole position in Singapore, it was Fernando Alonso who mastered the street circuit on Saturday night.

The Ferrari driver, having won from pole position two weeks ago in Italy, left Vettel and his team boss Christian Horner bemused by outpacing the fastest RB6 by half a tenth.

Vettel, 23, called his Q3 effort “messy”, as Horner told British television BBC: “He touched the barrier on his final lap and that was the difference today.”

In the sister Red Bull, championship leader Mark Webber qualified fifth, having not looked comfortable between the walls of the city layout so far this weekend.

The Australian, also behind the two McLarens for the start of Sunday’s race, admitted he has had “trouble getting a rhythm around here”.

“We underperformed,” admitted Horner. “We should be two or three tenths up the road.”

In contrast, it was a notably focused session for Alonso, who grappled with having to change some settings from the cockpit following teammate Felipe Massa’s earlier gearbox failure.

“We made some safe changes in the car to avoid any risk,” said the Spaniard, whose team initially believed Massa’s problem was engine-related.

Alonso told his team on the radio: “No words, fantastic job today.”

He will have a clear run to turn 1 on Sunday at 8pm local time, alongside fellow front row sitter Vettel.

“I think we had the car to be on pole but we have a very good car for tomorrow,” insisted the German.