Start the Week: Musk’s ‘thermonuclear’ threat to advertisers; Nine to extend tennis deal as cricket bidding begins; ABC shakeup

Welcome to the Start the Week podcast, recorded first thing on Monday, looking at the agenda for the week ahead.

Today:

• Twitter lays off half its staff, including most of the Australian team;

• Musk threatens ‘thermonuclear’ retaliation against marketers who cancel advertising;