Rangers striker Kenny Miller has been arrested in connection with an alleged brawl at an upmarket restaurant hours after an Old Firm match.
Burnley boss Sean Dyche has reiterated the strong working relationship he enjoyed with Joey Barton last season.
Barton, 34, is currently serving a three-week club suspension following a row with boss Warburton and teammate Andy Halliday.
United States international Perry Kitchen has been named the club captain of Scottish club Hearts for this season.
On Monday, Barton was suspended for three weeks after reportedly holding talks with manager Mark Warburton and board members.
Lawwell's rebuttal came just hours after it emerged that Barton, 34, was facing a ban after allegedly breaking strict betting rules.