Hi, manu! I've just seen some gameplay from two concurrent games and they're astonishingly bad. They were developed by teams formed by many people and quite a large amount of money was and is still being spent. However one thing I enjoyed from the aforementioned games is that they tried to include motion capture to provide more realistic motion (eventually failing) and you know that it requires money, time, and work. Motion and graphics is maybe the weak spot of TE2013.
I'd like to ask you if there's any particular reason behind your decision to work alone on TE4.
I'd also be curious to know if you received any offer from any company to support the game. I love TE2013, but I'm sure that TE4 would benefit from some investors or a bigger team, considering that in two years the tennis video game market could get much more competitive.
Have a nice day!
