Tennis Masters Series 2003 Cheats

Press [Tab] + [Shift] at the main menu,
then enter one of the following codes to activate the corresponding
cheat function.

Code
Leyton Hewitt unlocked yefetdovi
Two on one match callsomebody
Win current season endseason
Trainer

At the main-menu enter TAB and SHIFT and then enter one of the following codes:

CALLSOMEBODY- Two players against one.
YEFETDOVI - Leyton Hewitt.

At the main menu. Then enter one of the following codes:

Code - Effect
callsomebody - Two on one matches
yefetdovi - Unlock Leyton Hewitt
endseason - Win current season