Felix Auger-Aliassime will battle with compatriot Milos Raonic for a place in the final of the Stuttgart Open.
Runner-up at the 2018 Stuttgart Open, Milos Raonic continued his comeback from injury by beating Jo-Wilfried Tsonga in Germany on Wednesday.
Making his grass-court debut on the ATP Tour, Canadian teenager Felix Auger-Aliassime was far too good for Ernests Gulbis.
Nick Kyrgios and Borna Coric will meet in the Miami Open last 16 after contrasting third-round wins.
Milos Raonic suffered a first loss to Dominic Thiem, with the Austrian advancing to face Roger Federer in the Indian Wells Masters final.
Milos Raonic and Dominic Thiem will meet in the Indian Wells Masters semi-finals.
Untroubled at the Indian Wells Masters, Roger Federer and Rafael Nadal are on track for a 39th meeting.
German third seed Alexander Zverev was stunned by countryman Jan-Lennard Struff in straight sets in the third round on Monday.
The first day of the 2019 Dubai Tennis Championships saw Roger Federer advance while Milos Raonic and Karen Khachanov were eliminated.
Having lost to Milos Raonic at the Australian Open, Stan Wawrinka overcame the Canadian in Rotterdam to reach the quarter-finals.