How to counter attack a serve with backspin

Hello Alois, first congratulations for your master classes it have helped me a lot in improving my game level,

I consider my self an intermediate advance player, the only thing is that there is one opponent I can not defeat, first, he is a defensive chopper, and he always serve with backspin, and sidespin, short and long, most of the time to my backhand side,  so if I push the ball, he attacks with a smash, or slow sppiny second, if I push the ball short, he reverts to me with a short push, and then I hit the net and lost the point, Third, If I attack him, with a forehand topspin or backhand topspin, 80% of the time it always gone out of the table,

Please give me an advise  to counter attack him when he is serving, and playing with a lot of backhand and forehand push, so I can defeat this player and may be I will be able to win the tournament that is about to begin.

 Regards,

Jose,

p.s, Keep up the excellent work, greeting to jeff plumb and alois.