Tennis refactor proposal

TennisGame1.java

public class TennisGame1 implements TennisGame {

    private int scoreP1 = 0;
    private int scoreP2 = 0;
    private String player1Name = "player1";
    private String player2Name = "player2";

    public TennisGame1(String player1Name, String player2Name) {
        this.player1Name = player1Name;
        this.player2Name = player2Name;
    }

    public void wonPoint(String playerName) {
        if (playerName.equals(player1Name))
            scoreP1 += 1;
        else
            scoreP2 += 1;
    }

    public String getScore() {
        if (scoreP1 == scoreP2) {
            if (scoreP1 < 3) {
                return pointsName(scoreP1) + "-All";
            }
            return "Deuce";
        } else if (scoreP1 >= 4 || scoreP2 >= 4) {
            return findWinnerOrAdvantage();
        }
        return pointsName(scoreP1) + "-" + pointsName(scoreP2);
    }

    private String findWinnerOrAdvantage() {
        return Math.abs(scoreP1 - scoreP2) > 1 ? "Win for " + getPlayerWithMaxPoint() : "Advantage " + getPlayerWithMaxPoint();
    }

    private String getPlayerWithMaxPoint() {
        return scoreP1 > scoreP2 ? player1Name : player2Name;
    }

    private static String pointsName(int points) {
        switch (points) {
            case 0:
                return "Love";
            case 1:
                return "Fifteen";
            case 2:
                return "Thirty";
            case 3:
                return "Forty";
            default:
                return "";
        }
    }
}