pygame window keeps blinking when I run it even though I can still move the objects

Question

from Button_tactics import Score
import pygame
from plyer import Player
from Client import Network


class Game:
    def __init__(self):
        self.width = 1280
        self.height = 800
        self.window = pygame.display.set_mode((1280, 800))
        pygame.display.set_caption("Football Simulator")

    def RedrawWindow(self, p, p2):
        score = Score()
        # Builds the GUI
        self.window.fill((50, 50, 50))
        self.BuildFootballPitch()
        #score.Draw()
        p.DrawPlayerShape(self.window)
        p2.DrawPlayerShape(self.window)

    def BuildFootballPitch(self, dark_green=(76, 153, 0), white=(255, 255, 255)):
        # This draws the football pitch on the screen
        # rectangle = x, y, width, height
        # circle = x, y
        # line = start x end y, start x end y, width

        # MAIN FIELD
        rect1 = (260, 0, 750, 775)
        pygame.draw.rect(self.window, dark_green, rect1)
        rect2 = (315, 40, 640, 675)
        pygame.draw.rect(self.window, white, rect2, 2)
        pygame.draw.line(self.window, white, (315, 375), (953, 375), 2)
        circle1 = (630, 375)
        pygame.draw.circle(self.window, white, circle1, 50, 2)
        # THE GOALPOST AND BOX
        rect3 = (532.5, 40, 200, 100)
        pygame.draw.rect(self.window, white, rect3, 2)
        rect4 = (582.5, 40, 100, 53.25)
        pygame.draw.rect(self.window, white, rect4, 2)
        rect5 = (532.5, 615, 200, 100)
        pygame.draw.rect(self.window, white, rect5, 2)
        rect6 = (582.5, 662.5, 100, 53.25)
        pygame.draw.rect(self.window, white, rect6, 2)
        # CORNER MARKS
        circle2 = (315, 715)
        pygame.draw.circle(self.window, white, circle2, 40, 2, True, False, False, False)
    circle3 = (955, 715)
    pygame.draw.circle(self.window, white, circle3, 40, 2, False, True, False, False)
    circle4 = (955, 40)
    pygame.draw.circle(self.window, white, circle4, 40, 2, False, False, True, False)
    circle5 = (315, 40)
    pygame.draw.circle(self.window, white, circle5, 40, 2, False, False, False, True)


def main():
    game = Game()
    clock = pygame.time.Clock()
    # Allows the window to stay open
    running = True
    n = Network()
    p = n.ReturnP()

    while running:
        clock.tick(60)
        p2 = n.Send(p)

        for events in pygame.event.get():
            if events.type == pygame.QUIT:
                running = False
                pygame.quit()
                pass

        p.Move()
        game.RedrawWindow(p, p2)

        pygame.display.update()


if __name__ == '__main__':
    main()

When I run this code the whole window starts flickering. I can still control the plays on the window though. I have looked around and some people have claimed that it is to do with having 'pygame.display.update' duplicates in their code, however I have checked this. I am not sure why it is doing this because surely I should not be able to move my players if the display is updating too quickly?