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Real Madrid's opener against Al-Hilal at Miami's Hard Rock Stadium only has 200 tickets left officially - though thousands of resale ones are available.

For those wanting to understand the forces at play over the next month of competition in the US, Miami's Hard Rock Stadium on Wednesday would be an ideal place to start.

Deep in the bowels of Miami's Hard Rock Stadium, a note is taped to the door of Shakira's production office.

In 2012, Sir Paul joined Springsteen on stage at the end of the singer's headline slot at Hard Rock Calling in Hyde Park, London, but both stars found their microphones cut off before they could address the crowds after exceeding the curfew.

The band sold 73,500 albums in its opening week, including 47,000 vinyl LPs — the most of any hard rock band in the modern era.