Task: Categorize the tweet's emotional tone as either 'neutral or no emotion' or identify the presence of one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
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