A defensive mix-up allowed Sheffield United in for the winner on Sunday while the Head Coach considered that both Rangers' goals came from mistakes in last night's 2-0 defeat at Ibrox.
Otherwise, Jacques insisted he was pleased with the first half of a tough work out against the Scottish giants.
"Rangers are a good team," said Jacques. "They are ready now and in less than two weeks they begin their championship.
"They are strong with international players. My team played a good first half but were punished by two mistakes.
"Against a team with good players like Rangers two mistakes means two goals. We have a young team and I hope these mistakes won't happen again."
Jacques Santini is hoping to quickly iron out the mistakes that have cost us in recent friendlies.