Determine the emotional tone of the following tweet: "One step forward, two steps backward, the link to RogerFedererShop doesn´t work.😰 I am losing hope about Roger Federer new Website #sadness". Use the provided emotions: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. Respond with the emotions you identify or "neutral or no emotion".
sadness