Task: Categorize the tweet's emotional expression, classifying it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that reflect the tweeter's state of mind.
Tweet: One step forward, two steps backward, the link to RogerFedererShop doesn´t work.😰 I am losing hope about Roger Federer new Website #sadness
This tweet contains emotions: 
sadness