The deaths of 19 children and two teachers in a shooting at a school in Texas last week made Andy Murray angry and upset.
In 1996, Murray was a student at the school where 16 children and a teacher were murdered.
There have been over 200 mass shootings in America this year and nothing has changed, he said.
I can't understand that.
The shooting in Uvalde on 24 May has caused new calls for gun control measures in the United States, although several senior Republicans have already expressed their opposition to tighter rules on gun ownership.
On Friday, former US president Donald Trump told the National Rifle Association's annual conference that decent Americans should be allowed firearms to defend themselves against evil.
Ted Cruz has accused Democrats and the media of trying to restrict the constitutional rights of law-abiding citizens.
The police response to the shooting will be investigated by the US Department of Justice.
Murray thinks that changes need to happen.
At some point you do something different, he said.
You cannot keep approaching the problem by buying more guns and having more guns in the country. I don't see how that can solve it.
I could be wrong. If you get a different outcome, try something different.
I heard something on the radio the other day and it was a child from that school, and I experienced the same thing when I was at Dunblane, where the teacher came out and told the children to hide.
The kid told the same story about how she survived it.
They said they go through these drills when they are young children. How? How is it normal for children to have to go through drills in case someone comes into a school with a gun?
I hope they make some changes because it is really upsetting.