Twisted tennis racket frame

A twisted tennis racket frame comprising:

• a handle (20);
• two supporting arms (30) extended from an end (21) of the handle (20) and each having an inside surface (31) and an outside surface (32), the inside surfaces (31) of the two supporting arms (30) facing each other, the outside surfaces (32) of the two supporting arms (30) facing reverse directions;
• and
• a head (40) which is annular-shaped and provided on an imaginary plane (50) with a large arc portion (41), which is C-shaped and has two ends (42) connected with ends of the two supporting arms (30) respectively, and a small arc portion (45) connected with the two ends (42) of the large arc portion (41), the large arc portion (41) having an external arc surface (43) and an internal arc surface (44), the external arc surface (43) and the outside surfaces (32) of the two supporting arms (30) composing a continuous curved surface (60);
• wherein the continuous curved surface (60) has at least one twisted section (70) provided with a starting end (71), which is located at the large arc portion (41) of the head (40) and faces toward a first facing direction (81) that is situated on the imaginary plane (50), and a terminal end (72), which is connected with the handle (20) and defined with a second facing direction (82), an included angle between the second facing direction (82) and the first facing direction (81) being larger than 0 degree and not larger than 180 degrees.