Border collie won't come back into the house

[Alana]

Hi everyone, my border collie won't come back into the house after I run him with the ball on the green or if he gets out the house by accident. I call him and call him and he just doesn't listen and the only way I can get him back in the house is if I open the boot of the car and pretend we are going to the beach. He will soon cop on to that though if I do it numerous times. I have had him nearly two years and at the start when I got him he used to come in on his own, now he doesn't. I feel like I am retracing my steps. How do I get him to come in the house on his own without any problems? Would love for a reply thank you, Alana.