Back in 2019 i took a Cruise from Hawaii to Sydney for 30 days on the NCL Jewel and played tennis on the basketball court every sea day between 8-10am. They put up a net for us. They did not have but a few balls though and the net around the court wasn't perfectly thought out and some balls slipped under the cable. They did not have any rackets, I had brought my own. In 2022 i took the NCL Gem from NYC to Panama and returned back 22 days of cruising and this ship is the same layout as the Jewel...they had to get a net and it took like 5 days, but they did provide it and a few balls...no rackets lol. So is there anybody else that knows any of the other ships that allow Tennis and have a net? I will say if the wind is blowing they usually close the deck off and we were unable to play that day. Even on port days they would put up the net if we asked the Activity Staff. Thanks NCL you Rock!!!