SAP spokesman James Dever confirmed on Friday that Apotheker had written Ellison "seeking a dialogue," but declined to provide a copy of the letter.

The letter was sent Sept. 15 and consisted of the following brief statement, according to the Journal: "As you know, we have significant concerns about Oracle's proposed takeover of Sun. We renew our invitation to meet to attempt to resolve our concerns and other open issues between our companies. Please let us know if and when you would like to meet."

The WSJ's editorial referred to speculation that the European Commission is blocking the Sun acquisition due to lobbying efforts by SAP. It also noted that one major "open issue" between the companies is the intellectual property lawsuit Oracle filed against SAP in connection with TomorrowNow, a now-shuttered subsidiary of SAP that provided third-party support for Oracle applications. Oracle has said its damages could top US$1 billion.

Meanwhile, the timing of Apotheker's letter implies that he "either believed, or wanted Oracle to believe, that he could smooth the merger review if he so desired," the editorial alleged.

The insinuations raised by the WSJ are baseless, according to Dever. "I disagree with the assumptions and inferences that were made," he said. "It certainly overstates what SAP can and is able to do."

"The fact is we have a deep relationship with Oracle that goes beyond a lawsuit," including many mutual customers, Dever added. "We're partners as well as competitors."

An Oracle spokeswoman didn't immediately respond to a request for comment.

Meanwhile, the European Commission is reportedly planning to issue a formal "statement of objections" against the merger. If that happens, Oracle plans to mount a vigorous offensive campaign with the aid of senior US political officials, IDG News Service reported this week.