This is the best summary I could come up with:

On Monday, Microsoft CEO Satya Nadella showed up at the Google antitrust trial to back the Department of Justice's argument that "Google used unfair tactics"—most significantly, default search contracts—to block opportunities for search competitors like Bing, The Wall Street Journal reported.

At the trial, Nadella said that in Silicon Valley, Internet search is “the biggest no-fly zone,” which the Journal characterized as "the hardest market to crack."

Third-party data showed that "Microsoft’s share of the search market has hardly budged" since adding AI features to Bing, but Google’s lead trial counsel, John Schmidtlein, argued that this was "a direct result of Microsoft’s missteps in Internet search," not due to Google's command of the market.

Nadella also expressed significant concern that emerging AI technology—rather than providing opportunities for competitors like Bing—could ultimately further entrench Google's dominance in search without the court's interference.

“In fact, if anything, I worry a lot that—even in spite of my enthusiasm that there is a new angle with AI—this vicious cycle that I’m trapped in could even become even more vicious because the defaults get reinforced.” He added: "This going to be even worse of a nightmare to make progress in search, because there's a new avenue" for Google to "lock up essentially" the "thing that feeds" AI models, "which is content."

Nadella told the court that to Microsoft, search is "a hard game to make any breakthroughs, but no one can accuse us of not being persistent."

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