Answer: Subject--Verb--Direct Object
Step-by-step explanation:
The wrestlers shook hands after their match. The wrestlers is the subject of the sentence headed by a plural noun : wrestlers.
Shook is a transitive verb, therefore it takes a direct object that is the noun
Hands. To find a direct object we can easily try making a question:
What did the wrestlers shake? the answer is the direct object.
After their match is an adverbial adjunct of time headed by After.