While spectators watch she plays tennis, dressed in white.
She is playing tennis against another person.
If she is being watch by spectators, it is safe to say that she is playing tennis against another person.
exists p1 p2 p3.(exists x6.n_event(x6) & exists e3 e2 e1 s1 x1 x2 x3 x4 x5.(Theme(e3,x2) & Actor(e3,x1) & v_watch(e3) & Theme(e2,s1) & Theme(s1,x5) & a_white(s1) & Theme(e2,x4) & v_dress(e2) & (x2 = x4) & Theme(e1,x2) & Actor(e1,x3) & v_play(e1) & n_tennis(x2) & (x2 = x3) & n_female(x2) & n_spectator(x1)) & while(p2,p3))
exists e1 x1 x2 x3.(n_person(x3) & against(e1,x1) & n_person(x1) & -(x1 = x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_tennis(x2) & n_female(x1))