Guest Rewards is once again serving up a treat for its members with a two-for-one ticket offer to the US Open tennis championship tournament.

The US Open is held each year in Flushing, N.Y. Guest Rewards members have several different tournament sessions from which to choose.

The two-for-one tickets are available for select sessions on Aug. 30 and 31, and Sept. 1, 6, 7 and 9.

Ticket costs increase as the tournament goes on; earlier sessions range from $22 to $33, while tickets for the late rounds will run upwards of $100.

Tickets are available for purchase through Ticket Master until Aug. 23. Members are allowed to purchase up to four daytime session tickets and get four free, and six evening session tickets (plus six free).

To purchase tickets, call (866) OPEN-TIX or go to http://www.ticketmaster.com and enter promotional code BAMTRAK.