Numbers show that slot revenue slipped last month at both Mohegan Sun and Foxwoods Resort Casino.
Mohegan Sun, located in Uncasville, reported its September revenue to be $49.9 million, representing a $4.8 million decline.
Total wagering at Mohegan Sun was also down $49 million since this time last year, representing a decline of 7 percent.
Foxwoods in Mashantucket reported a revenue of $44.8 million in September, down $1.5 million from its 2012 numbers.
Total wagering at Foxwoods came out to $508.1 million, also 7 percent decrease.
Pressure from competing casinos around the Northeast, particularly in New York, and a weakened economy have reduced spending at both Mohegan Sun and Foxwoods Resort Casino.