Welcome back to the Monday Tennis Briefing, where will explain the stories behind the stories from the past week on court. This week, Daniil Medvedev’s slump continued, another tennis tournament confirmed it was getting longer, and an American reached her first 500-level final after a strange week for her compatriots. But then Serena Williams appeared at Super Bowl LIX with Kendrick Lamar, bringing the hammer down on Drake once more. Why Serena Williams joined Kendrick Lamar at Super Bowl LIX in