05/17/2010 05:12 am ET Updated May 25, 2011

Pete Sampras: Agassi Clash 'Regrettable,' But No Apology

Three days after a highly public conflict with Andre Agassi, Pete Sampras finally addressed the issue on Tuesday.

The 14-time Grand Slam winner said his feud with Agassi was "regrettable" and that it "just bums me out," but he did not directly apologize for his role in the clash. Sampras told the Los Angeles Times that his back-and-forth with Agassi "makes our relationship uncomfortable."

The two longtime rivals mocked each other at a charity event on Saturday night. While they (along with Roger Federer and Rafael Nadal) attended to raise money for the American Red Cross efforts in Haiti, Agassi and Sampras made headlines for another reason entirely. Sampras poked fun at Agassi's walking style, while Agassi insinuated that Sampras is a bad tipper. Click here to see the full exchange.

On Monday, Agassi said that he feels "sick about" the situation and offered to apologize to Sampras directly, but had not heard back from his adversary.