How to smoothen out ball movement using Photon

Hi, I am making an online 2D soccer game using Photon and need help getting the ball’s movement to be smoother. I have already set up the player movement but when the ball moves it is very glitchy and jumps around a lot. I have the following code on the ball:

public class ballMoveNetworking : MonoBehaviour {
	Vector3 targetPos;

	PhotonView PhotonView;

	// Use this for initialization
	void Start () {
		PhotonView = GetComponent<PhotonView> ();
		PhotonNetwork.sendRate = 60;
		PhotonNetwork.sendRateOnSerialize = 30;
	}
	
	// Update is called once per frame
	void Update () {
		if (!PhotonView.isMine) {
			smoothMove ();
		}
	}


	private void smoothMove(){
		transform.position = Vector3.Lerp(transform.position, targetPos, 0.25f );
	}



	private void OnPhotonSerializeView(PhotonStream stream, PhotonMessageInfo info){
		if (stream.isWriting) {
			stream.SendNext (transform.position);

		} else {
			targetPos = (Vector3)stream.ReceiveNext ();

		}
	}
}

This script is in the ‘Observed Components’ option in a Photon View Component on the ball.
Thanks in advance.

transform.position = Vector3.Lerp(transform.position, targetPos, 5*Time.deltaTime);