Britain's Davis Cup team has delayed its journey to Belgium with Brussels once again under lockdown ©Getty Images

Great Britain have opted to delay travelling to Belgium for the Davis Cup final with the country's capital city Brussels remaining on high alert.

The British team were due to make the journey today ahead of their showdown with the hosts - but have now opted to go tomorrow amid warnings of an "imminent" terrorist attack.

Ghent, 56 kilometres away from Brussels, will host the final of the biggest team tennis tournament from Friday with Brussels experiencing a second day of lockdown today.

The state of unease in the city follows the atrocities in Paris on November 13, which left at least 130 people dead after a series of shootings and bombings.

Andy Murray is set to lead Britain's team in Belgium
Andy Murray is set to lead Britain's team in Belgium ©Getty Images

Brussels metro services have been suspended and people have been asked to avoid crowds with Salah Abdeslam, a key suspect after the Paris attacks, still at large and thought to be in Belgium.

Belgian police are also hunting for other people with fears growing of a similar attack to Paris in the country.

International Tennis Federation President David Haggerty admitted that there were "great concerns" about the raised terror alert yesterday, but there has as yet been no indication about the three-day final being postponed.

Belgium's football friendly with Spain was cancelled in Brussels on Tuesday.

"The safety of everyone in the British contingent, including our players and fans, remains our number one priority," read a statement by Britain's Lawn Tennis Association.

Britain, whose team will be spearheaded by two-times grand slam winner and Olympic champion Andy Murray, will be contesting their first final since 1978 on clay courts at Ghent's Flanders Expo.

They haven't won the competition since 1936, while Belgium haven't been in the final since 1904.

The British squad practiced on clay courts at London's Queens Club today.

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