Murray urges calm ahead of doubles rubber

Jamie Murray has issued a warning to himself and his brother Andy ahead of their Saturday's doubles rubber in the Davis Cup final.

Emotions were running high in the Flanders Expo on the opening day of Davis Cup final between Belgium and Britain.

The hosts were warned that the fans in the arena ran the risk of breaking the 'partisan crowd rule', and were heard making hissing noises between first and second serves. 

World number two Andy Murray, meanwhile, received a penalty-point for swearing during his singles victory over Rubens Bemelmans.

The tense feeling in the stadium is also unlike to dissipate on Saturday when the Murray brothers contest the doubles rubber against Steve Darcis and Kimmer Koppejans which may well decide the tie.

"You know that there are going to be so many people there supporting you, screaming for you, and cheering for you. After every point at Davis Cup ties, it's so loud it's a joke, and so every point starts to mean something," Jamie Murray told ESPN.

"In tennis, some points are more important than others, depending on the score. It's hard to maintain that when people are screaming and shouting after every point, regardless of the situation. For me, that's been the most difficult thing about playing in the Davis Cup.

"It's the mental challenge of trying not to get too caught up in the whole fervour of it. It's about trying to stay in the process of what you're trying to do. And trying not to get too excited or to try too hard to win every single point as obviously you won't do that. Just play point by point and leave it at that."

The 2015 season has been something of a break-out year for the elder Murray brother – he reached two grand slam finals, the first of his career, and qualified for the World Tour Finals in London.

"That experience of playing in those previous rounds, that's going to be more of a benefit than having played in two Grand Slam finals this year. That's because the Davis Cup tie brings such a different atmosphere," Jamie said.

"This final is different because it's away from home. We've had such great support in our matches this year, and it won't be the same in terms of numbers in the crowd for us. I think you have more togetherness when you're playing an away tie because you feel as though it's the team against the country, whereas at home you've got everyone there with you. So it's just a different atmosphere and different mentality.

"At first, I don't think I quite grasped how big an achievement it was to get to the final. And how far-reaching it is. The guys on the tour have congratulated me more for what I have been doing in the Davis Cup than for reaching Grand Slam finals or anything else I've done on the tour.

"Britain hasn't won it for so many years, and we're going to be doing everything we can to make it happen because what an achievement that would be, and that's something you would have for life."