Model was in no hurry to resume the offensive. He decided to commit the 9.Panzer-Division in Harpe’s sector and he ordered his two flank corps to continue limited objectives attacks. Then, he waited for Luftflotte 6 to gain air superiority over the sector, which they did. Soviet air losses over the northern battlefield on the first two days of Zitadelle were horrendous – 191 aircraft versus 36 for the Luftwaffe. With the skies cleared of enemy bombers, Model began to attack Pukhov’s second line of defence around noon. There was no real Schwerpunkt on this second day of Zitadelle, just short-range jabs by 2.Panzer-Division and Sauvant’s Tigers toward Ol’khovatka and by 9.Panzer-Division toward the Snova River valley. Harpe’s XXXXI Panzerkorps mopped up the remnants of the 81st Rifle Division north of Ponyri, with the support of the remaining Ferdinands and 18.Panzer-Division. Polkovnik Nikolai V. Petrushin’s 129th Tank Brigade (more than 40 tanks) tried to support the hard-pressed Soviet infantry but was driven off by the Ferdinand’s long 8.8cm gun. However, a few SU-152s managed to get into good firing positions and engaged the Ferdinands; at least one Ferdinand was knocked out with a flank shot from 800 metres. Nevertheless, the Germans pressed on and with the added help of Generalleutnant Walter Scheller’s 9.Panzer-Division approaching from the northwest, reached the outskirts of Ponyri by dusk. As the last of his first line of defence crumbled, Pukhov had time to move the 307th Rifle Division and the rest of Petrushin’s 129th Tank Brigade to hold Ponyri. Pukhov placed General-major Mikhail A. Enshin, an NKVD officer, in charge of the defence of Ponyri.
Lemelsen’s XXXXVII Panzerkorps pushed toward Ol’khovatka with Generalleutnant Vollrath Lübbe’s 2. Panzer-Division in the lead. Lübbe’s Panzers found the Soviet second line in this sector held by the 6th Guards Rifle Division (6 GRD), which was well supported by artillery and anti-tank guns. The German tanks blundered into a minefield and no less than 12 of Sauvant’s Tigers suffered mine damage. Heavy artillery fire pounded the Germans while they were tangled out in the obstacle belt and high velocity 76.2mm rounds ripped into immobilized vehicles. Lübbe’s Panzers managed to push through some weak spots in the 6 GRD’s line, but then ran straight into elements of the 70th and 75th Guards Rifle Divisions. Soviet POZ detachments laid new mines in front of the approaching Panzers, just as they thought they had cleared the obstacle belt. As evening approached, General-major Ivan D. Vasil’ev’s 19th Tank Corps mounted a sudden counter-attack into Lemelsen’s right flank, but the 20.Panzer-Division was screening this area and knocked out 30 T-34s. The day was a disappointment for Model, with more heavy casualties and no breakthrough achieved. At best, his Panzers had advanced another 2–4km, but it was clear that Soviet resistance was getting tougher. Although not hopeful of achieving a real breakthrough and linking up with von Manstein’s forces, Model decided to commit his remaining armour, the 4. and 12.Panzer-Divisionen on the next day.
By 7 July, Model decided to focus all his combat power in just the Ol’khovatka and Ponyri sectors, while essentially shifting to the defence on the rest of his front. At 0630 hours, Harpe’s XXXXI Panzerkorps attacked Ponyri from the north with the 292.Infanterie-Division supported by Ferdinands and assault guns, while 18.Panzer-Division attacked from the west. Enshin’s defence was rock solid and supported by over 300 artillery pieces, which repulsed four German attacks. It was not until 1100 hours that a fifth attack succeeded in gaining some ground and getting into the edge of Ponyri, but the rest of the day was consumed in Stalingrad-style urban combat that accomplished nothing. Nor did Scheller’s 9.Panzer-Division achieve anything useful; it advanced 3km southwest in an effort to outflank Ponyri before running into mines and an impenetrable blocking position held by the 43rd Tank Regiment (30 T-34s) and the 1st Anti-Tank Brigade; Scheller lost nine tanks knocked out and 30 more immobilized by mechanical defects and damage. The fact that an entire German Panzerkorps could not capture a town held by a rifle division indicated the growing poverty of German resources.
Before Lemelsen could jump off on the morning of 7 July, Soviet A-20 bombers struck again and destroyed five Pz IV tanks in 2.Panzer-Division’s tactical assembly area. Following that rude shock, Lübbe formed Kampfgruppe Burmeister (Sauvant’s Tigers, Pz.Regt. 3, I./Pz. Gr. Regt. 304 (SPW), self-propelled artillery, Panzerjägers) under his most experienced armoured leader and ordered him to seize the corps objective – Ol’khovatka – while 20.Panzer-Division screened the extended right flank of XXXXVII Panzerkorps. Oberst Arnold Burmeister was one of the most experienced Panzer-Regiment commanders on the Eastern Front and German commanders were given wide tactical discretion under the mission-orders concept. Burmeister decided that before proceeding to Ol’khovatka that he needed to secure the Soviet-held village of Samodurovka, which was sniping at his Kampfgruppe with long-range anti-tank fire. His mass of armour struck units from the 140th Rifle Division holding this village and easily forced them to withdraw, while destroying a company of supporting T-34s in the process. However, Burmeister did not have sufficient infantry to hold this village so he left it vacant and turned eastward toward Ol’khovatka. Normally, moving parallel to the front of an alerted enemy is one of the worst tactical choices that a commander can make because it exposes them to enfilade fire. The Soviets had established a defence north of Ol’khovatka with the 75 GRD, supported by Grigor’ev’s 16th Tank Corps and two batteries of 85mm anti-craft guns, with plenty of mines in front. As Burmeister presented his flank to the enemy, the Soviets unleashed volleys of 85mm armour-piercing rounds and barrages of heavy artillery on the armoured phalanx. One of Major Sauvant’s Tigers was hit by an 85mm AP round in the side, which penetrated and destroyed it. The rest of Burmeister’s Kampfgruppe was badly battered and Oberst Wilhelm von Goerne, commander of Panzer-Grenadier-Regiment 304, was killed. Rather than retire from a poor tactical situation, Burmeister elected to engage dug-in Soviet tanks in a long-range gunnery duel that lasted until nightfall. In order to have a reasonable probability of striking a dug-in T-34, with only its turret showing above ground, a Tiger had to close to within 500 metres, but mines made it difficult to close up on the target.{84} During the action between 2.Panzer-Division and 16th Tank Corps, which involved no more than 100 tanks on each side, Major Aleksei F. Sankovsky’s 1541 SUP entered the battle with his SU-152s. Although Sankovsky claimed multiple Tigers and Ferdinands (which were not deployed in this sector) destroyed, it is more likely that he was aiming at Pz IVs. Soviet tankers tended to regard the Pz IVs with Schürzen as heavy tanks but in any case, Soviet propaganda dubbed Sankovsky’s SU-152s as Zvierboy (‘Animal Hunters’). In reality, it was the mines, 85mm AA guns and heavy artillery that defeated Burmeister’s attack. At dusk, Burmeister withdrew after failing to accomplish his mission.