Proteas bowling coach Charl Langeveldt admitted the Melbourne Test against Australia had been a tough exercise for the bowlers.The Proteas' bowlers slogged it out late on day one until the end of day three, where Australia racked up 575/8 declared on the back of 200 from David Warner and 111 from Alex Carey.After the Proteas batters failed again and were bundled out 189, the bowlers found themselves in a position where Australia batted through the gears to post their massive total.MATCH REPORT | Proteas near Test series defeat after Australia dominate in MelbourneLangeveldt was happy with how fast bowler Anrich Nortje applied himself, but felt there was a general lack of control that allowed the hosts to bolt away in the second Test."It's been a tough three days for us as a bowling unit," Langeveldt said."We didn't start well on day 1, but the next day was kind of rewarding with the effort and Anrich bowled with a lot of heat."If there's something we need to speak about, it's our control because it's something I think we can improve."The bowlers have played a few Tests together, so it's being able to control the run rate for longer periods, but I was happy with the enthusiasm they showed."Langeveldt was also more than happy with the pitch prepped by Matt Page, adding that it rewarded patient bowling.ANALYSIS | Proteas' gun bowling unnecessarily carries scars of deficient battingLangeveldt was also quick to point out that the batting malfunction was a group matter and not just something that should be pinned on the specialist batters alone."We haven't played on a good cricket wicket in a while and this is a good cricket wicket," Langeveldt said."You get the reward if you stay patient with the ball.