Hi Everyone

Today I was reading an article and I came across a word. The word is "
Claim"; I have written few sentences using the word "
Claim". I request you guys to please check the grammar and the sentences formation of the below sentences.
Sentence no 1- Mike has claimed that he won a lottery ticket.
Sentence no 2- I have heared the news, Mike is claiming that the car which had an accident was his car.
I have refered a dictionary and it shows the meaning of Claim is "To say something is true" and "Something that you say is true."
Many thanks in advance....
Gaurav