Leonardo DiCaprio had primo seats in the president’s box at the US Open finals Monday night, but he was as concerned about his gal pal Toni Garrn as the action on the court, spies said.

Garrn was over in Moet & Chandon’s suite at Arthur Ashe Stadium, with “The Great Gatsby” director Baz Luhrmann, Alex Skarsgard, Jessica Alba and new couple Justin Long and Amanda Seyfried, who spies say were “acting lovey-dovey.”

“Leo was sitting in the area where Queen Sofia of Spain, Anna Wintour, Martha Stewart and Ralph Lauren’s crew were all seated,” said a witness. “But he kept looking over and waving and texting Toni.”

Leo’s pal Lukas Haas even popped into Moet’s private box, “looking for Toni to check on her.” Finally during the last set, Leo came over to hang out with her, but, “stayed inside the suite and kept his sunglasses and newsboy hat on the whole time.”

After the match, Princess Beatrice came by to party, along with Karolina Kurkova. Next door in Heineken’s suite, David Beckham was seen in a bespoke suit and tie with a body guard, saying it was his first time at the Open. He added he was meeting wife Victoria later. Also in the beer brand’s box were Peter Sarsgaard and Joe Jonas.