Joao Fonseca booked his place in back-to-back quarter-finals of ATP Tour events for the first time in his career after defeating Arthur Rinderknech at the Munich Open. 

Fonseca, who also reached the last eight at the Monte-Carlo Masters last week before losing to Alexander Zverev, earned a 6-3 6-2 victory over Rinderknech on Wednesday.

The talented Brazilian traded blows with his opponent early in the first set before getting the better of Rinderknech's serve in the fourth game on Munich's Centre Court. 

On his way to claiming the first set, Fonseca was forced into saving four break points, and he opened the second set with a break of his own against the Rinderknech serve. 

And after squandering three break points in the seventh game, Fonseca eventually got the job done, sealing his progression with a blistering serve that whistled by Rinderknech. 

"That was a super important key for today," said Fonseca on saving nine break points in the match. "I was pretty focused on today's match, I knew it was going to be difficult.

"He's already a great player, and here at altitude he can play very good tennis. Serve and volley, and drop shots. He's full of weapons, so I needed to be very focused.

"He made some great returns today. At 3-2, when I was serving, that was a super important game to keep it up.

"I was 0/40, and then I made some good serves. For sure, these points were key for today."

Stefanos Tsitsipas and Fabian Marozsan completed their first-round match, which was suspended at 2-2 in the deciding set on Tuesday due to darkness.

And it was the world number 42 Marozsan, who had saved a match point at 5-6, 30-40 in the second set, who ultimately prevailed 3-6, 7-6 (7-5), 6-4.  

Data Debrief: Fonseca flying in Munich

Having reached his sixth ATP Tour quarter-final, and third at ATP 500 level, Fonseca has risen five spots to number 30 in the ATP rankings so far this week.

And he did so with relative ease here, winning 76% (31/41) of his first-serve points compared to Rinderknech's 62% (37/56), while also having just one double fault to his opponents five.