Complex sentence: In a further twist of synchronicity, in the same week, Stevens announced he was taking a break from race riding due to severe damage to his right knee, a completely torn ACL, and the need for a total knee replacement.
Split into simpler sentences: In a further twist of synchronicity, in the same week, Stevens announced he was taking a break from race riding. He had severe damage to his right knee, a completely torn ACL, and required a total knee replacement.