Seeing probably the best player in the world, seemingly not able to solve on court strategy himself, being reliant on coaches and petulant when it's not working is quite frankly ridiculous.
Coaches should be banned from courtside totally and all top 50 player matches should have Hawkeye live.
It always amuses me to see the Asian lady line judging so often.
She's a perennial line judge at these events.
She was the one who was threatened by Serena ("I'll ram this ball down your throat"), scurried of to the umpire to report. Serena denied it, the crowd behind the position all chorusing telling the umpire "yes she did"
That match was against Woz if I'm not mistaken.