[4] He is the third Dutch cyclist to have won both of the cobbled Monument spring classics, Paris–Roubaix and the Tour of Flanders, after Jan Raas and Hennie Kuiper.

In 2009 Terpstra won the 3rd stage in the Critérium du Dauphiné Libéré, gaining the yellow leader jersey at the same time, keeping it for a day.

[7] In 2015, Terpstra defended his Tour of Qatar title, holding the race lead after winning the individual time trial on Stage 3.

[8] At Omloop Het Nieuwsblad, Terpstra made the decisive breakaway of four riders with teammates Tom Boonen and Stijn Vandenbergh, along with Ian Stannard (Team Sky).

[11] In June, he won the Dutch National Road Race Championships in a bunch sprint, surprising the pure sprinters.

[13] In 2018, Terpstra won E3 Harelbeke, soloing to the line after initially attacking on the Taaienberg with teammate Yves Lampaert with more than 70 kilometres (43 miles) remaining.

Terpstra finished 20 seconds clear of an elite group, led home by his team-mate Philippe Gilbert, and he became the first Dutchman to win E3 Harelbeke since Steven de Jongh in 2003.

[17] The following week, Terpstra claimed third place at Paris–Roubaix, leading home a group 57 seconds behind winner Peter Sagan (Bora–Hansgrohe) and Silvan Dillier (AG2R La Mondiale).