"We have a good advantage because we have more points and a better goal difference [than Everton]," said the Israeli.
"But there are still 12 points to be played for so we have to make sure we do not lose concentration because if we do Everton could close the gap.
"It is obviously important for the club to finish as high up the league as possible.
"We want to play in the Champions League because it is a competition we enjoy and to do that you have to make sure you finish in the top four.
"In the last few weeks we have played really well in the league and, apart from the game against Man United, we have had some good results.
"But now we have to keep our good form going because there are no easy games in the Premier League."