Alonso double spares chelsea from bournemouth defeat

I think there may be some confusion here!

Alonso is likely referring to Marcos Alonso, a Spanish professional footballer who plays as a left-back for Chelsea FC.

However, I couldn't find any evidence of Marcos Alonso scoring a double to spare Chelsea from a defeat against Bournemouth. Could you be thinking of a different match or player?

If you could provide more context or clarify which match you're referring to, I'd be happy to try and help you out!