"It is just a very short period of time where we were successful - we are still 14th in the league," he said.
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"Yes, we take the confidence from our performances, but it is our challenge, our job to show these performances over a whole season, because we can't be happy being 14th in the table.
"So we take the positivity, take the enthusiasm, but we stay grounded, continue to work hard because otherwise it can go very, very quickly in the other direction and this is what we all don't want."