By Ali Lyon The US Open kicks off on Monday. The final Grand Slam in the calendar year will see Carlos Alcaraz going for his third major title of 2024 and Coco Gauff vowing to retain the Women’s trophy she picked up last year. Here are the main talking points for the tournament before proceedings at Flushing Meadows get going. British tennis enters its post-Murray eraHis litany of high profile injuries means that viewers have become accustomed to Andy Murray’s absence from major tournaments. But this year’s US Open will be the first Grand Slam in nearly 20 years that the Scot is not a professi…