Wow Federer lost against del potro which makes huge loss of whole gambling words infact mine too that is why this tennis is so unpredictable. Yesterday Karoline pliskova also giveaway the match in the same style against vendawaghe and after seeing these defeats i highly doubts some low ranked players that they will surely do fixing in tennis . Not saying that yesterday losses were fixed but just watch some ITF matches you will clearly realises that something is wrong happening .