Europe's players celebrated a knee-knocking 15-13 Ryder Cup victory over the United States in New York by trolling Donald Trump. "Are you watching Donald Trump," sang the victorious players in response to Rory McIlroy receiving a text message from the US president, who is a well-known golf fan. And Trump, who made a brief appearance at the Bethpage Black course on Saturday, took it well, writing on social media: "Yes, I'm watching. "We were having a moment together with the team, and Rory got a text from the president. McIlroy has played golf with Trump and last week spoke about his affinity for the United States.