Scottish & Newcastle has said it would benefit by £100m a year if it took full control of BBH, the Russian brewer it jointly owns with Carlsberg.
Russian beer Baltika is one of BBH's brands
The UK brewer's comments came as it submitted a claim to an arbitration tribunal, which will decide if S&N can acquire Carlsberg's 50% stake in BBH.
S&N is currently fighting a takeover approach from Heineken and Carlsberg.
S&N says Carlsberg's involvement in the bid move breaches the joint deal on BBH and allows it to buy Carlsberg out.
Carlsberg has previously said that S&N's claims on BBH had "no merit".
The Heineken-Carlsberg consortium has made a 750p-a-share approach for S&N, an offer that the UK brewer has rejected as "wholly inadequate".
The UK's Takeover Panel has issued a deadline of 21 January for the Heineken-Carlsberg group to make a formal bid.
If the consortium is successful in its bid for S&N, Carlsberg plans to take full control of BBH.
However, S&N is taking Carlsberg to court in Sweden, arguing that by taking part in the bid approach it has triggered a clause in the BBH agreement that allows the wronged party to buy out the other firm's shares in BBH at a fair market price.
In its submission to the court, S&N also said that taking full control of BBH would allow it to enjoy cost and revenue benefits of £100m a year.
A decision on the issue is due by 3 July.